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NSR database version of April 11, 2024.

Search: Author = J.Rekstad

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2011LA05      Phys.Rev. C 83, 034315 (2011); Erratum Phys.Rev. C 97, 094901 (2018)

A.C.Larsen, M.Guttormsen, M.Krticka, E.Betak, A.Burger, A.Gorgen, H.T.Nyhus, J.Rekstad, A.Schiller, S.Siem, H.K.Toft, G.M.Tveten, A.V.Voinov, K.Wikan

Analysis of possible systematic errors in the Oslo method

NUCLEAR REACTIONS ⁵⁰V, ¹¹⁷Sn, ^160,164Dy(³He, α), E not given; ⁵⁰V, ^160,162,164Dy(³He, ³He'), E not given; ⁴⁶Ti(p, p'), E=15-32 MeV; analyzed previous experimental data and simulated data for particle and γ spectra, (particle)γ-coin, γ-ray transmission coefficients and strength functions, level densities. ^56,57,58Fe, ^96,97,98Mo(³He, ³He'); analyzed first generation matrix, parity distributions. Analysis of systematic errors in Oslo method for the simultaneous extraction of the level density and γ-ray transmission coefficient from (particle)γ-coincidence data.

doi: 10.1103/PhysRevC.83.034315
Citations: PlumX Metrics

2009SY01      Phys.Rev. C 79, 024316 (2009)

N.U.H.Syed, M.Guttormsen, F.Ingebretsen, A.C.Larsen, T.Lonnroth, J.Rekstad, A.Schiller, S.Siem, A.Voinov

Level density and γ-decay properties of closed shell Pb nuclei

NUCLEAR REACTIONS ^206,208Pb(³He, ³He'γ), (³He, αγ), E=38 MeV; measured Eγ, Iγ, (particle)γ-coin; deduced spin distributions, level densities, entropies, temperature, γ-ray strength functions. Comparison of E1 and M1 strengths with Standard Lorentzian and enhanced generalized Lorentzian models.

doi: 10.1103/PhysRevC.79.024316
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1680.

2008AL35      Phys.Rev. C 78, 054321 (2008)

E.Algin, U.Agvaanluvsan, M.Guttormsen, A.C.Larsen, G.E.Mitchell, J.Rekstad, A.Schiller, S.Siem, A.Voinov

Thermodynamic properties of ^{56, 57}Fe

NUCLEAR REACTIONS ⁵⁷Fe(³He, ³He'γ), (³He, αγ), E=45 MeV; measured Eγ, Iγ, (particle)γ-coin. Deduced level densities, thermodynamic properties.

doi: 10.1103/PhysRevC.78.054321
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO1669.

2007AL49      Phys.Atomic Nuclei 70, 1634 (2007)

E.Algin, A.Schiller, A.Voinov, U.Agvaanluvsan, T.Belgya, L.A.Bernstein, C.R.Brune, R.Chankova, P.E.Garrett, S.M.Grimes, M.Guttormsen, M.Hjorth-Jensen, M.J.Hornish, C.W.Johnson, T.Massey, G.E.Mitchell, J.Rekstad, S.Siem, W.Younes

Bulk properties of iron isotopes

NUCLEAR REACTIONS ⁵⁷Fe(³He, α), (³He, ³He'), E=45 MeV; ⁵⁶Fe(n, γ), E=thermal; ⁵⁵Mn(d, n), E=7.0 MeV; measured Eγ, Iγ. Deduced nuclear level densities and radiative strength functions. Compared results to model calculations.

doi: 10.1134/S1063778807090232
Citations: PlumX Metrics

2007GU15      Acta Phys.Pol. B38, 1489 (2007)

M.Guttormsen, R.Chankova, A.C.Larsen, J.Rekstad, S.Siem, N.U.H.Syed, U.Agvaanluvsan, A.Schiller, A.Voinov

The Role of Broken Cooper Pairs in Warm Nuclei

2007LA23      Acta Phys.Pol. B38, 1495 (2007)

A.C.Larsen, M.Guttormsen, R.Chankova, F.Ingebretsen, T.Lonnroth, S.Messelt, S.W.Odegard, J.Rekstad, S.Siem, N.U.H.Syed, A.Schiller, A.Voinov

Radiative Strength Functions of Warm Nuclei in the 1f_7/2 Shell

NUCLEAR REACTIONS ⁵¹V, ⁴⁵Sc(³He, αγ), (³He, ³He'γ), E=30, 38 MeV; measured Eγ, Eα, E(³He), (particle)γ-coinc. ^50,51V, ^44,45Sc deduced level densities and giant resonance strength functions.

2007LA31      Phys.Rev. C 76, 044303 (2007)

A.C.Larsen, M.Guttormsen, R.Chankova, F.Ingebretsen, T.Lonnroth, S.Messelt, J.Rekstad, A.Schiller, S.Siem, N.U.H.Syed, A.Voinov

Nuclear level densities and γ-ray strength functions in ^{44, 45}Sc

NUCLEAR REACTIONS ⁴⁵Sc(³He, αγ), (³He, ³He'γ), E=38 MeV; measured Eγ, Iγ. ⁴⁴Sc, ⁴⁵Sc; deduced level densities, γ-strength functions, parity asymmetry.

doi: 10.1103/PhysRevC.76.044303
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO1700.

2007SI17      Acta Phys.Pol. B38, 1499 (2007)

S.Siem, M.Guttormsen, R.Chankova, A.C.Larsen, J.Rekstad, A.Schiller, N.U.H.Syed

Level Densities and γ Strength Functions in ^{146, 147}Sm Nuclei

NUCLEAR STRUCTURE ^146,147Sm; analyzed data to extract nuclear level density and radiative strength functions. Compared results to existing data.

2006CH14      Phys.Rev. C 73, 034311 (2006)

R.Chankova, A.Schiller, U.Agvaanluvsan, E.Algin, L.A.Bernstein, M.Guttormsen, F.Ingebretsen, T.Lonnroth, S.Messelt, G.E.Mitchell, J.Rekstad, S.Siem, A.C.Larsen, A.Voinov, S.Odegard

Level densities and thermodynamical quantities of heated ^93-98Mo isotopes

NUCLEAR REACTIONS ^94,96Mo(³He, ³He'), (³He, α), E=30 MeV; ⁹⁸Mo(³He, ³He'), (³He, α), E=45 MeV; measured particle spectra, Eγ, Iγ, (particle)γ-coin. ^{93,94,95,96,97,98}Mo deduced level densities; deduced thermodynamical quantities, phase transition features.

doi: 10.1103/PhysRevC.73.034311
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO1671.

2006KA40      Phys.Rev. C 74, 024325 (2006)

K.Kaneko, M.Hasegawa, U.Agvaanluvsan, E.Algin, R.Chankova, M.Guttormsen, A.C.Larsen, G.E.Mitchell, J.Rekstad, A.Schiller, S.Siem, A.Voinov

Breaking of nucleon Cooper pairs at finite temperature in ^93-98Mo

NUCLEAR STRUCTURE ^{93,94,95,96,97,98}Mo; calculated level densities, heat capacities, pair correlation features.

doi: 10.1103/PhysRevC.74.024325
Citations: PlumX Metrics

2006LA12      Phys.Rev. C 73, 064301 (2006)

A.C.Larsen, R.Chankova, M.Guttormsen, F.Ingebretsen, S.Messelt, J.Rekstad, S.Siem, N.U.H.Syed, S.W.Odegard, T.Lonnroth, A.Schiller, A.Voinov

Microcanonical entropies and radiative strength functions of ^{50, 51}V

NUCLEAR REACTIONS ⁵¹V(³He, ³He'), (³He, α), E=30 MeV; measured Eγ, Iγ, (particle)γ-coin. ^50,51V deduced level densities, radiative strength functions.

doi: 10.1103/PhysRevC.73.064301
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO1699.

2006SC07      Phys.Lett. B 633, 225 (2006)

A.Schiller, A.Voinov, E.Algin, J.A.Becker, L.A.Bernstein, P.E.Garrett, M.Guttormsen, R.O.Nelson, J.Rekstad, S.Siem

Low-energy M1 excitation mode in ¹⁷²Yb

NUCLEAR REACTIONS ¹⁷³Yb(³He, α), E=45 MeV; ¹⁷¹Yb(n, γ), E=thermal; measured Eγ, Iγ, (particle)γ-coin, γγ-coin. ¹⁷²Yb deduced radiative strength functions, resonance multipolarity, B(M1).

doi: 10.1016/j.physletb.2005.12.043
Citations: PlumX Metrics

2006SC17      Phys.Rev. C 74, 017305 (2006)

A.Schiller, A.V.Voinov, E.Algin, L.A.Bernstein, P.E.Garrett, M.Guttormsen, R.O.Nelson, J.Rekstad, S.Siem

Primary versus secondary γ intensities in ¹⁷¹Yb(n_th, γ)

NUCLEAR REACTIONS ¹⁷¹Yb(n, γ), E=thermal; measured Eγ, Iγ, γγ-coin; deduced primary and secondary γ intensities.

doi: 10.1103/PhysRevC.74.017305
Citations: PlumX Metrics

2006VO06      Phys.Rev. C 74, 014314 (2006)

A.V.Voinov, S.M.Grimes, U.Agvaanluvsan, E.Algin, T.Belgya, C.R.Brune, M.Guttormsen, M.J.Hornish, T.Massey, G.E.Mitchell, J.Rekstad, A.Schiller, S.Siem

Level density of ⁵⁶Fe and low-energy enhancement of γ-strength function

NUCLEAR REACTIONS ⁵⁵Mn(d, n), E=7 MeV; measured En, σ(E, θ). ⁵⁶Fe deduced level density, γ-strength function.

doi: 10.1103/PhysRevC.74.014314
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1463.

2005GU16      Phys.Rev. C 71, 044307 (2005)

M.Guttormsen, R.Chankova, U.Agvaanluvsan, E.Algin, L.A.Bernstein, F.Ingebretsen, T.Lonnroth, S.Messelt, G.E.Mitchell, J.Rekstad, A.Schiller, S.Siem, A.C.Sunde, A.Voinov, S.Odegard

Radiative strength functions in ^93-98Mo

NUCLEAR REACTIONS ^94,96Mo(³He, ³He'), (³He, α), E=30 MeV; ^97,98Mo(³He, ³He'), (³He, α), E=45 MeV; measured particle spectra, Eγ, Iγ, (particle)γ-coin. ^{93,94,95,96,97,98}Mo deduced radiative strength functions.

doi: 10.1103/PhysRevC.71.044307
Citations: PlumX Metrics

2005SI07      Acta Phys.Pol. B36, 1089 (2005)

S.Siem, M.Guttormsen, E.Algin, U.Agvaanluvsan, T.Belgya, R.Chankova, G.Mitchell, L.A.Bernstein, J.Rekstad, A.Schiller, A.C.Sunde, N.Syed, A.Voinov

Soft resonances in hot nuclei

NUCLEAR STRUCTURE ^{93,94,95,96,97,98}Mo, ^148,149Sm, ^161,162Dy, ^166,167Er, ^171,172Yb; analyzed radiative strength functions, resonance features.

2005SU07      Acta Phys.Pol. B36, 1197 (2005)

A.C.Sunde, M.Guttormsen, R.Chankova, F.Ingebretsen, T.Lonnroth, S.Messelt, J.Rekstad, A.Schiller, S.Siem, N.U.H.Syed, A.Voinov, S.W.Odegard

Thermal and electromagnetic properties of the light vanadium isotopes ^{50, 51}V

NUCLEAR REACTIONS ⁵¹V(³He, ³He'), (³He, α), E not given; measured Eγ, Iγ. ^50,51V deduced radiative strength functions, thermodynamic properties.

2004AG05      Phys.Rev. C 70, 054611 (2004)

U.Agvaanluvsan, A.Schiller, J.A.Becker, L.A.Bernstein, P.E.Garrett, M.Guttormsen, G.E.Mitchell, J.Rekstad, S.Siem, A.Voinov, W.Younes

Level densities and γ-ray strength functions in ^{170, 171, 172}Yb

NUCLEAR REACTIONS ¹⁷¹Yb(³He, ³He'), (³He, α), E=45 MeV; measured Eγ, Iγ, (particle)γ-coin. ¹⁷²Yb(³He, ³He'), (³He, α), E=45 MeV; ¹⁷³Yb(³He, α), E=45 MeV; analyzed Eγ, Iγ, (particle)γ-coin. ^170,171,172Yb deduced level densities, radiative strength functions, pygmy resonance features.

doi: 10.1103/PhysRevC.70.054611
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO0824.

2004VO12      Phys.Rev.Lett. 93, 142504 (2004)

A.Voinov, E.Algin, U.Agvaanluvsan, T.Belgya, R.Chankova, M.Guttormsen, G.E.Mitchell, J.Rekstad, A.Schiller, S.Siem

Large Enhancement of Radiative Strength for Soft Transitions in the Quasicontinuum

NUCLEAR REACTIONS ⁵⁷Fe(³He, ³He'), (³He, α), E=45 MeV; measured Eγ, Iγ, (particle)γ-coin. ⁵⁶Fe(n, γ), E=thermal; measured Eγ, Iγ, γγ-coin. ^56,57Fe deduced radiative strength functions, quasicontinuum enhancement.

doi: 10.1103/PhysRevLett.93.142504
Citations: PlumX Metrics

2004VO17      Yad.Fiz. 67, 1891 (2004); Phys.Atomic Nuclei 67, 1866 (2004)

A.V.Voinov, A.Schiller, E.Algin, L.A.Bernstein, P.E.Garrett, M.Guttormsen, R.O.Nelson, J.Rekstad, S.Siem

Nature of the Pygmy Resonance in Continuous γ Spectra

NUCLEAR REACTIONS ¹⁷¹Yb(n, γ), E=thermal; measured Eγ, Iγ, γγ-coin; deduced pygmy resonance energy, width.

doi: 10.1134/1.1811192
Citations: PlumX Metrics

2003GU03      J.Phys.(London) G29, 263 (2003)

M.Guttormsen, E.Melby, J.Rekstad, S.Siem, A.Schiller, T.Lonnroth, A.Voinov

Level density and γ-ray strength in ^{27, 28}Si

NUCLEAR REACTIONS ²⁸Si(³He, ³He'), (³He, α), E=45 MeV; measured Eγ, Iγ. ^27,28Si deduced level densities, γ-ray strength functions.

doi: 10.1088/0954-3899/29/2/303
Citations: PlumX Metrics

2003GU12      Phys.Rev. C 68, 034311 (2003)

M.Guttormsen, R.Chankova, M.Hjorth-Jensen, J.Rekstad, S.Siem, A.Schiller, D.J.Dean

Free energy and criticality in the nucleon pair breaking process

NUCLEAR STRUCTURE ^171,172Yb, ^166,167Er, ^161,162Dy, ^148,149Sm; analyzed level densities; deduced Helmholtz free energy, other thermodynamic quantities, continuous nucleon pair breaking.

doi: 10.1103/PhysRevC.68.034311
Citations: PlumX Metrics

2003GU25      Phys.Rev. C 68, 064306 (2003)

M.Guttormsen, A.Bagheri, R.Chankova, J.Rekstad, S.Siem, A.Schiller, A.Voinov

Thermal properties and radiative strengths in ^{160, 161, 162}Dy

NUCLEAR REACTIONS ¹⁶¹Dy(³He, ³He'), (³He, α), E=45 MeV; measured Eγ, Iγ. ¹⁶¹Dy(³He, ³He'), (³He, α), E=45 MeV; ¹⁶³Dy(³He, α), E=45 MeV; analyzed Eγ, Iγ. ^160,161,162Dy deduced level densities, radiative strength functions, pygmy resonance parameters.

doi: 10.1103/PhysRevC.68.064306
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO1702.

2003SC32      Phys.Rev. C 68, 054326 (2003)

A.Schiller, E.Algin, L.A.Bernstein, P.E.Garrett, M.Guttormsen, M.Hjorth-Jensen, C.W.Johnson, G.E.Mitchell, J.Rekstad, S.Siem, A.Voinov, W.Younes

Level densities in ^{56, 57}Fe and ^{96, 97}Mo

NUCLEAR REACTIONS ⁵⁷Fe, ⁹⁷Mo(³He, ³He'), (³He, α), E=45 MeV; measured particle spectra, Eγ, Iγ. ^56,57Fe, ^96,97Mo deduced level densities. Microscopic model, pairing plus random interaction.

doi: 10.1103/PhysRevC.68.054326
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO1669.

2002SC36      Phys.Rev. C66, 024322 (2002)

S.Schiller, M.Guttormsen, M.Hjorth-Jensen, J.Rekstad, S.Siem

Model for pairing phase transition in atomic nuclei

NUCLEAR STRUCTURE ⁵⁶Mn, ^58,59Fe, ^104,105,106Pd, ¹⁶⁰Tb, ^161,162Dy, ^234,235U, ²³⁸Np; calculated level densities, thermodynamic properties, pairing phase transition features.

doi: 10.1103/PhysRevC.66.024322
Citations: PlumX Metrics

2002SI09      Phys.Rev. C65, 044318 (2002)

S.Siem, M.Guttormsen, K.Ingeberg, E.Melby, J.Rekstad, A.Schiller, A.Voinov

Level Densities and γ-Strength Functions in ^{148, 149}Sm

NUCLEAR REACTIONS ¹⁴⁹Sm(³He, ³He'), (³He, α), E=45 MeV; measured Eγ, Iγ, (charged particle)γ-coin. ^148,149Sm deduced level densities, γ-strength functions, thermodynamic properties, pygmy resonance features. Comparisons with neighboring nuclides.

doi: 10.1103/PhysRevC.65.044318
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO1701.

2001GU11      Phys.Rev. C63, 044301 (2001)

M.Guttormsen, M.Hjorth-Jensen, E.Melby, J.Rekstad, A.Schiller, S.Siem

Entropy of Thermally Excited Particles in Nuclei

NUCLEAR STRUCTURE A=20-250; analyzed level densities; deduced single-particle entropy, related features.

doi: 10.1103/PhysRevC.63.044301
Citations: PlumX Metrics

2001GU23      Phys.Rev. C64, 034319 (2001)

M.Guttormsen, M.Hjorth-Jensen, E.Melby, J.Rekstad, A.Schiller, S.Siem

Heat Capacity and Pairing Transition in Nuclei

NUCLEAR STRUCTURE ¹⁶²Dy; calculated entropy, heat capacity, other thermodynamic quantities; deduced role of pairing transition. ⁵⁶Mn, ^58,59Fe, ¹⁰⁴Rh, ^105,106Pd, ¹⁶⁰Tb, ^161,162Dy, ²³⁴Pa, ^234,235U; calculated level densities.

doi: 10.1103/PhysRevC.64.034319
Citations: PlumX Metrics

2001ME07      Phys.Rev. C63, 044309 (2001)

E.Melby, M.Guttormsen, J.Rekstad, A.Schiller, S.Siem, A.Voinov

Thermal and Electromagnetic Properties of ¹⁶⁶Er and ¹⁶⁷Er

NUCLEAR REACTIONS ¹⁶⁷Er(³He, α), (³He, ³He'), E=45 MeV; measured Eγ, Iγ, (particle)γ-coin. ^166,167Er deduced level densities, γ-ray strength functions, pygmy resonance features, thermal properties.

doi: 10.1103/PhysRevC.63.044309
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO1446.

2001SC02      Phys.Rev. C63, 021306 (2001)

A.Schiller, A.Bjerve, M.Guttormsen, M.Hjorth-Jensen, F.Ingebretsen, E.Melby, S.Messelt, J.Rekstad, S.Siem, S.W.Odegard

Critical Temperature for Quenching of Pair Correlations

NUCLEAR REACTIONS ^162,163Dy, ^172,173Yb(³He, X), E=45 MeV; measured Eα, Eγ, αγ-coin. ^161,162Dy, ^171,172Yb deduced level density and heat capacity vs excitation energy, critical temperature for phase-transition.

doi: 10.1103/PhysRevC.63.021306
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO1670.

2001SC36      Yad.Fiz. 64, No 7, 1263 (2001); Phys.Atomic Nuclei 64, 1186 (2001)

A.Schiller, M.Guttormsen, M.Hjorth-Jensen, E.Melby, J.Rekstad, S.Siem

Level Density and Thermal Properties in Rare Earth Nuclei

NUCLEAR REACTIONS ¹⁶²Dy(³He, ³He'), E=45 MeV; ^162,163Dy, ^172,173Yb(³He, α), E=45 MeV; measured Eγ, Iγ. ^161,162Dy, ^171,172Yb deduced level densities, thermodynamic quantities, pygmy resonance strength.

doi: 10.1134/1.1389540
Citations: PlumX Metrics

2001SI13      Acta Phys.Pol. B32, 855 (2001)

S.Siem, M.Guttormsen, K.Ingeberg, E.Melby, J.Rekstad, A.Schiller

Thermal Quenching of Pair Correlations and γ-Strength Functions in ^{148, 149}Sm

NUCLEAR REACTIONS ¹⁴⁹Sm(³He, ³He'), (³He, α), E=45 MeV; measured Eγ, Iγ, (charged particle)γ-coin. ^148,149Sm deduced level densities, γ-strength functions.

2001VO05      Phys.Rev. C63, 044313 (2001)

A.Voinov, M.Guttormsen, E.Melby, J.Rekstad, A.Schiller, S.Siem

γ-Ray Strength Function and Pygmy Resonance in Rare Earth Nuclei

NUCLEAR REACTIONS ^162,163Dy, ^172,173Yb(³He, α), E=45 MeV; measured Eγ, Iγ, (particle)γ-coin. ^161,162Dy, ^171,172Yb deduced level densities, γ-ray strength functions, pygmy resonance features. Comparison with model predictions.

doi: 10.1103/PhysRevC.63.044313
Citations: PlumX Metrics

2000GU25      Phys.Rev. C61, 067302 (2000)

M.Guttormsen, M.Hjorth-Jensen, E.Melby, J.Rekstad, A.Schiller, S.Siem

Energy Shifted Level Densities in Rare Earth Region

NUCLEAR REACTIONS ^162,163Dy, ^172,173Yb(³He, α), E=45 MeV; measured α spectra, Eγ, Iγ. ^161,162Dy, ^171,172Yb deduced level densities vs excitation energy, energy shift parameter. Comparison with model predictions.

doi: 10.1103/PhysRevC.61.067302
Citations: PlumX Metrics

2000GU26      Phys.Rev. C62, 024306 (2000)

M.Guttormsen, A.Bjerve, M.Hjorth-Jensen, E.Melby, J.Rekstad, A.Schiller, S.Siem, A.Belic

Entropy in Hot ^{161, 162}Dy and ^{171, 172}Yb Nuclei

NUCLEAR REACTIONS ^162,163Dy, ^172,173Yb(³He, α), E=45 MeV; measured Eγ, Iγ, Eα, Iα, αγ-coin. ^161,162Dy, ^171,172Yb deduced level densities, entropy vs excitation energy.

doi: 10.1103/PhysRevC.62.024306
Citations: PlumX Metrics

2000ME25      Phys.Scr. T88, 138 (2000)

E.Melby, L.Bergholt, M.Guttormsen, M.Hjorth-Jensen, F.Ingebretsen, S.Messelt, J.Rekstad, A.Schiller, S.Siem, S.W.Odegard

Experimental Temperature and Heat Capacity in Rare Earth Nuclei

NUCLEAR REACTIONS ¹⁶³Dy, ¹⁶⁷Er, ¹⁷³Yb(³He, α), E=45 MeV; measured Eγ, Iγ, αγ-coin. ¹⁶²Dy, ¹⁶⁶Er, ¹⁷²Yb deduced level densities, temperature vs excitation energy, heat capacities.

doi: 10.1238/Physica.Topical.088a00138
Citations: PlumX Metrics

2000SC07      Phys.Rev. C61, 044324 (2000)

A.Schiller, M.Guttormsen, E.Melby, J.Rekstad, S.Siem

Level Density and γ Strength Function in ¹⁶²Dy from Inelastic ³He Scattering

NUCLEAR REACTIONS ¹⁶²Dy(³He, ³He'), E=45 MeV; measured particle spectra, Eγ, Iγ, (particle)γ-coin. ¹⁶²Dy deduced level density, γ strength function. Comparison with previous results.

doi: 10.1103/PhysRevC.61.044324
Citations: PlumX Metrics

2000SC24      Nucl.Instrum.Methods Phys.Res. A447, 498 (2000)

A.Schiller, L.Bergholt, M.Guttormsen, E.Melby, J.Rekstad, S.Siem

Extraction of Level Density and γ Strength Function from Primary γ Spectra

NUCLEAR REACTIONS ¹⁷³Yb(³He, α), E=45 MeV; analyzed Eγ, Iγ. ¹⁷²Yb deduced level density, γ strength distribution. Iterative procedure.

doi: 10.1016/S0168-9002(99)01187-0
Citations: PlumX Metrics

2000SC33      Phys.Scr. T88, 144 (2000)

A.Schiller, L.Bergholt, M.Guttormsen, E.Melby, S.Messelt, J.Rekstad, S.Siem

Level Densities and γ-Strength Functions in Rare Earth Nuclei

NUCLEAR REACTIONS ¹⁶²Dy(³He, ³He'), E=45 MeV; measured Eγ, Iγ, (particle)γ-coin. ¹⁶²Dy deduced level density and temperature vs excitation energy, pygmy resonance strength vs temperature.

doi: 10.1238/Physica.Topical.088a00144
Citations: PlumX Metrics

2000SI41      Acta Phys.Hung.N.S. 12, 299 (2000)

S.Siem, A.Schiller, M.Guttormsen, M.Hjorth-Jensen, E.Melby, J.Rekstad

Level Density and Thermal Properties in Rare Earth Nuclei

NUCLEAR REACTIONS ^162,163Dy, ^172,173Yb(³He, α), E=45 MeV; measured Eα, Eγ, αγ-coin. ^161,162Dy, ^171,172Yb deduced level density, γ-strangth functions, thermodynamic properties.

1999ME23      Phys.Rev.Lett. 83, 3150 (1999)

E.Melby, L.Bergholt, M.Guttormsen, M.Hjorth-Jensen, F.Ingebretsen, S.Messelt, J.Rekstad, A.Schiller, S.Siem, S.W.Odegard

Observation of Thermodynamical Properties in the ¹⁶²Dy, ¹⁶⁶Er, and ¹⁷²Yb Nuclei

NUCLEAR REACTIONS ¹⁶³Dy, ¹⁶⁷Er, ¹⁷³Yb(³He, α), E=45 MeV; measured Eγ, Iγ, αγ-coin. ¹⁶²Dy, ¹⁶⁶Er, ¹⁷²Yb deduced level densities, heat capacities, related thermodynamic properties.

doi: 10.1103/PhysRevLett.83.3150
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1997HU02      Phys.Rev. C55, 1805 (1997)

I.Huseby, T.S.Tveter, L.Bergholt, M.Guttormsen, E.Melby, J.Rekstad, S.Siem, R.K.Sheline

K Hindrance in Primary γ Decay After Thermal and Average Resonance Neutron Capture

NUCLEAR STRUCTURE ¹⁶⁸Er, ¹⁷⁴Yb, ¹⁷⁸Hf, ¹⁶⁶Ho, ^176,177Lu, ¹⁸²Ta; calculated forbidden, allowed transitions average reduced relative transition probabilities following thermal, average resonance neutron capture; deduced degrees of freedom role in K-forbidden, K-allowed transitions difference.

doi: 10.1103/PhysRevC.55.1805
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1997SI18      Acta Phys.Pol. B28, 419 (1997)

S.Siem, T.S.Tveter, L.Bergholt, M.Guttormsen, E.Melby, J.Rekstad

Level Densities in Rare Earth Nuclei

NUCLEAR REACTIONS ¹⁶³Dy, ¹⁷³Yb(³He, α), E=45 MeV; measured Eγ, Iγ. ¹⁶²Dy, ¹⁷²Yb deduced level densities, pair correlations effects.

1997TV01      Acta Phys.Pol. B28, 185 (1997)

T.S.Tveter, I.Huseby, L.Bergholt, M.Guttormsen, E.Melby, J.Rekstad, S.Siem, R.K.Sheline

Number of Degrees of Freedom in Primary γ-Decay After Neutron Capture

NUCLEAR STRUCTURE ¹⁶⁸Er, ¹⁷⁴Yb, ¹⁷⁸Hf, ¹⁶⁶Ho, ^176,177Lu, ¹⁸²Ta; analyzed primary transition probabilities following neutron capture; deduced K quantum number, neutron energy roles.

1996GU24      Nucl.Instrum.Methods Phys.Res. A374, 371 (1996)

M.Guttormsen, T.S.Tveter, L.Bergholt, F.Ingebretsen, J.Rekstad

The Unfolding of Continuum γ-Ray Spectra

NUCLEAR REACTIONS ¹⁶³Dy(³He, αγ), E=45 MeV; analyzed Eγ, Iγ. New γ-spectra unfolding method based on Compton scattering contributions' weak dependence on energy.

RADIOACTIVITY ¹⁵²Eu(EC), (β⁺), (β^-); analyzed Eγ, Iγ. New γ-spectra unfolding method based on Compton scattering contributions' weak dependence on energy.

doi: 10.1016/0168-9002(96)00197-0
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1996TV03      Phys.Rev.Lett. 77, 2404 (1996)

T.S.Tveter, L.Bergholt, M.Guttormsen, E.Melby, J.Rekstad

Observation of Fine Structure in Nuclear Level Densities and γ-Ray Strength Functions

NUCLEAR REACTIONS ¹⁶³Dy, ¹⁷³Yb(³He, αγ), E=45 MeV; measured γ spectra. ¹⁶²Dy, ¹⁷²Yb deduced γ strength function, level density features.

doi: 10.1103/PhysRevLett.77.2404
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1995GU06      Nucl.Phys. A587, 401 (1995)

M.Guttormsen, L.Bergholt, J.Rekstad, T.S.Tveter

Spin-Dependent Pre-Equilibrium Decay in the ¹⁶³Dy(³He, α) Reaction

NUCLEAR REACTIONS ¹⁶³Dy(³He, xnyα), E=45 MeV; measured σ(Eα), Eγ, Iγ, (αγ)-coin; deduced α-particle, neutron energy distributions. ¹⁶⁰Dy deduced ground state band spin distribution, Iγ. Enriched target, Ge, Si detectors.

doi: 10.1016/0375-9474(95)00023-T
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1995HE14      Nucl.Phys. A589, 249 (1995)

L.Henden, L.Bergholt, M.Guttormsen, J.Rekstad, T.S.Tveter

On the Relation between the Statistical γ-Decay and the Level Density in ¹⁶²Dy

NUCLEAR REACTIONS ¹⁶³Dy(³He, α), E=45 MeV; measured γ-spectra. ¹⁶²Dy deduced level density, possible enhanced M1 transitions.

doi: 10.1016/0375-9474(95)00133-L
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1995JE04      Nucl.Phys. A593, 162 (1995)

D.Jerrestam, B.Fogelberg, A.Kerek, W.Klamra, F.Liden, L.O.Norlin, J.Kownacki, D.Seweryniak, Z.Zelazny, C.Fahlander, J.Nyberg, M.Guttormsen, J.Rekstad, T.Spedstad-Tveter, A.Gizon, J.Gizon, R.Bark, G.Sletten, M.Piiparinen, Z.Preibisz, T.F.Thorsteinsen, E.Ideguchi, S.Mitarai

In-Beam Spectroscopic Studies of the Nucleus ¹⁰⁵Cd

NUCLEAR REACTIONS ¹⁰⁶Cd(p, np), E=30 MeV; ¹⁰⁶Cd(³He, 2n2p), E=75 MeV; ⁹²Zr(¹⁶O, 3n), E=77 MeV; ⁷⁶Ge(³⁴S, 5n), E=148 MeV; measured γγ, γγ(particle)-coin, Eγ, Iγ, DCO ratios. ¹⁰⁵Cd deduced levels, J, π, band structure, configuration. Compton suppressed Ge-detector array. Model calculations.

doi: 10.1016/0375-9474(95)00334-W
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1995RE12      Acta Phys.Pol. B26, 453 (1995)

J.Rekstad, L.Henden, L.Bergholt, T.S.Tveter, M.Guttormsen, I.Huseby, E.Melby

Level Densities Extracted from First-Generation γ-Ray Spectra

NUCLEAR REACTIONS ¹⁶³Dy(³He, α), E=45 MeV; measured γ-spectra. ¹⁶²Dy deduced level density features.

1995SH18      Phys.Rev. C51, 3078 (1995)

R.K.Sheline, L.Bergholt, M.Guttormsen, J.Rekstad, T.S.Tveter

ΔK Forbiddenness in Neutron Capture Resonances in ¹⁷⁷Lu

NUCLEAR STRUCTURE ¹⁷⁷Lu; analyzed γ-decay data following neutron capture in ¹⁷⁶Lu; deduced ΔK forbiddenness related features.

doi: 10.1103/PhysRevC.51.3078
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1995TV01      Nucl.Phys. A581, 220 (1995)

T.S.Tveter, L.Bergholt, M.Guttormsen, J.Rekstad

Statistical γ-Ray Multiplicity Distributions in Dy and Yb Nuclei

NUCLEAR REACTIONS ¹⁶³Dy, ¹⁷³Yb(³He, αxn), E=45 MeV; measured Eγ, Iγ, αγ-coin. ^162,163Dy deduced mean value (M), standard deviation σ(M) of the statistical multiplicity distribution as functions of Eα. Enriched targets, Ge, NaI, Si detectors.

doi: 10.1016/0375-9474(94)00454-U
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1995TV02      Acta Phys.Pol. B26, 383 (1995)

T.S.Tveter, L.Bergholt, J.Rekstad, M.Guttormsen, R.K.Sheline

The K Quantum Number and the γ-Decay of Neutron Resonances

NUCLEAR STRUCTURE ¹⁶⁸Er, ¹⁷⁸Hf, ¹⁶⁶Ho, ^177,176Lu, ¹⁸²Ta; calculated primary transition Iγ following (n, γ) reactions; deduced K quantum number neutron energy roles.

1994BE18      Phys.Rev. C50, 493 (1994)

L.Bergholt, M.Guttormsen, J.Rekstad, T.S.Tveter, R.K.Sheline

K Dependence in the γ Decay of Neutron Resonances in ¹⁶⁶Ho

NUCLEAR STRUCTURE ¹⁶⁶Ho; calculated (n, γ) associated Iγ; deduced K dependence, allowed, forbidden transition number.

doi: 10.1103/PhysRevC.50.493
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1994GU04      Nucl.Phys. A573, 130 (1994)

M.Guttormsen, L.Bergholt, F.Ingebretsen, G.Lovhoiden, S.Messelt, J.Rekstad, T.S.Tveter, H.Helstrup, T.F.Thorsteinsen

The (³He, α) Reaction Mechanism: A study of the angular momentum transfer

NUCLEAR REACTIONS ¹⁶³Dy(³He, αxn), E=45 MeV; measured σ(Eα), Eγ, Iγ, αγ-coin. ^162,160,158Dy deduced γ-ray side-feeding into ground-band states. Enriched target, Ge, Na, Si detectors.

doi: 10.1016/0375-9474(94)90017-5
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1994VL02      Nucl.Phys. A580, 133 (1994)

R.Vlastou, C.T.Papadopoulos, M.Serris, C.A.Kalfas, N.Fotiades, S.Harissopulos, S.Kossionides, J.F.Sharpey-Schafer, E.S.Paul, P.D.Forsyth, P.J.Nolan, N.D.Ward, M.A.Riley, J.Simpson, J.C.Lisle, P.M.Walker, M.Guttormsen, J.Rekstad

High-Spin Structure of ¹⁵⁵Dy

NUCLEAR REACTIONS ¹⁵⁶Gd(³He, 4n), E=39 MeV; ¹²⁴Sn(³⁶S, 5n), E=155 MeV; measured γγ-coin. ¹⁵⁵Dy deduced high-spin levels, J, π, B(λ) ratios, band structure.

doi: 10.1016/0375-9474(94)90819-2
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1993RE06      Phys.Rev. C47, 2621 (1993)

J.Rekstad, T.S.Tveter, M.Guttormsen, L.Bergholt

K Dependence in the Gamma Decay of Neutron Resonances in ¹⁶⁸Er and ¹⁷⁸Hf

NUCLEAR REACTIONS ¹⁶⁷Er, ¹⁷⁷Hf(n, γ), E not given; analyzed γ-decay data following neutron capture. ¹⁷⁸Hf, ¹⁶⁸Er deduced levels, Iγ, J, π, K. Transition rate K-selection rule dependence discussed.

doi: 10.1103/PhysRevC.47.2621
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1991GU04      Nucl.Phys. A531, 370 (1991)

M.Guttormsen, A.Atac, K.Klungland, S.Messelt, T.Ramsoy, J.Rekstad, T.S.Tveter, Z.Zelazny

Gross Properties of Statistical γ-Decay in ¹⁷²Yb

NUCLEAR REACTIONS ¹⁷³Yb(³He, α), E=45 MeV; measured σ(Eα), Eγ, Iγ, αγ-coin. ¹⁷²Yb deduced γ-ray multiplicity, statistical γ-decay features. Enriched target, Ge, NaI, Si detectors.

doi: 10.1016/0375-9474(91)90617-F
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1991RE06      Phys.Rev.Lett. 67, 2236 (1991)

J.Rekstad, T.S.Tveter, M.Guttormsen

Rekstad, Tveter, and Guttormsen Reply

NUCLEAR STRUCTURE ¹⁶⁸Er, ¹⁷⁸Hf; analyzed deduction from Iγ data analyses from (n, γ); deduced K-quantum number implications.

doi: 10.1103/PhysRevLett.67.2236
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1990GU14      Phys.Scr. T32, 54 (1990)

M.Guttormsen, A.Atac, G.Lovhoiden, S.Messelt, T.Ramsoy, J.Rekstad, T.F.Thorsteinsen, T.S.Tveter, Z.Zelazny

Statistical Gamma-Decay at Low Angular Momentum

NUCLEAR REACTIONS ¹⁷⁰Yb, ¹⁶²Dy(³He, ³He'), ¹⁷³Yb, ¹⁶²Dy(³He, α), E=45 MeV; measured γ(ejectile)-coin; deduced γ-emission mechanism.

doi: 10.1088/0031-8949/1990/T32/010
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1990RE15      Phys.Rev.Lett. 65, 2122 (1990)

J.Rekstad, T.S.Tveter, M.Guttormsen

Chaos in Nuclei and the K Quantum Number

NUCLEAR STRUCTURE ¹⁶⁸Er, ¹⁷⁸Hf; analyzed Iγ; deduced K-dependence, consequences for chaos.

doi: 10.1103/PhysRevLett.65.2122
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1990TV01      Nucl.Phys. A516, 1 (1990)

T.S.Tveter, M.Guttormsen, J.Rekstad, J.Kownacki, T.F.Thorsteinsen

On the ¹⁷¹Yb(³He, α) Reaction Mechanism

NUCLEAR REACTIONS ¹⁷¹Yb(³He, xnα), E=45 MeV; measured σ(Eα, θ), σ(Eα, Eγ, θ), Eγ, Iγ, αγ-coin. ^170,168,166Yb deduced yrast spin distributions. Enriched target, Ge, Si counters.

doi: 10.1016/0375-9474(90)90044-M
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1989AT03      Nucl.Phys. A496, 255 (1989)

A.Atac, M.Guttormsen, J.Rekstad, T.S.Tveter

Gamma Decay of ¹⁷²Yb After the (τ, τ') Inelastic Reaction

NUCLEAR REACTIONS ¹⁷²Yb(³He, ³He'), E=45 MeV; measured σ(E(³He)), Eγ, Iγ, (³He)γ-coin. ¹⁷²Yb deduced γ-ray multiplicity, branching ratios. Enriched target, Ge, NaI, Si counters.

doi: 10.1016/0375-9474(89)90175-9
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1989ZE01      Nucl.Phys. A499, 100 (1989)

Z.Zelazny, T.S.Tveter, A.Atac, M.Guttormsen, T.Ramsoy, J.Rekstad

First-Generation γ-Rays from Highly-Excited Even Rare-Earth Nuclei

NUCLEAR REACTIONS ^161,163Dy, ^171,173Yb(³He, α), E=45 MeV; measured σ(Eα, Eγ), γ(θ), Eγ, Iγ, αγ-coin. ^160,162Dy, ^170,172Yb deduced first generation γ-ray transitions, branching ratios. Enriched targets, Ge, NaI, Si counters. Fermi-gas model analysis.

doi: 10.1016/0375-9474(89)90271-6
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1988BA32      Phys.Scr. 37, 843 (1988)

T.Batsch, J.Kownacki, Z.Zelazny, M.Guttormsen, T.Ramsoy, J.Rekstad

Particle-Core Multiplets in ⁸⁹Y

NUCLEAR REACTIONS ⁸⁷Rb(α, 2n), E=24-34 MeV; measured Eγ, Iγ, γγ-coin, γ(θ). ⁸⁹Y deduced levels, J, π, configuration.

doi: 10.1088/0031-8949/37/6/001
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1988LO04      Nucl.Phys. A481, 71 (1988)

G.Lovhoiden, S.El-Kazzaz, J.R.Lien, K.Heyde, J.Rekstad, C.Ellegaard, J.H.Bjerregaard, P.Knudsen, P.Kleinheinz

Study of High-Spin Hole States in ¹⁴³Nd

NUCLEAR REACTIONS ¹⁴⁴Nd(³He, α), E=24 MeV; measured σ(E(α), θ). ¹⁴³Nd deduced levels, L, J, π, S. Enriched target. Unified model calculations.

doi: 10.1016/0375-9474(88)90473-3
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1987AT01      Nucl.Phys. A472, 269 (1987)

A.Atac, J.Rekstad, M.Guttormsen, S.Messelt, T.Ramsoy, T.F.Thorsteinsen, G.Lovhoiden, T.Rodland

The Decay of Hot Dysprosium Nuclei

NUCLEAR REACTIONS ^162,163Dy(³He, xnα), E=45 MeV; measured σ(Eα), Eγ, Iγ, αγ-coin. ^{162,161,160,159,158}Dy deduced γ-multiplicity, neutron energy, α-spectra. Enriched targets, Ge, NaI, Si detectors. Fermi-gas model analysis.

doi: 10.1016/0375-9474(87)90210-7
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1987GU08      Nucl.Instrum.Methods Phys.Res. A255, 518 (1987)

M.Guttormsen, T.Ramsoy, J.Rekstad

The First Generation of γ-Rays from Hot Nuclei

NUCLEAR REACTIONS ¹⁷¹Yb, ¹⁶³Dy(³He, α), E=45 MeV; measured Eγ, Iγ; deduced excitation energy independence of unfolding technique.

doi: 10.1016/0168-9002(87)91221-6
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1987RA16      Nucl.Phys. A470, 79 (1987)

T.Ramsoy, A.Atac, T.Engeland, M.Guttormsen, J.Rekstad, G.Lovhoiden, T.F.Thorsteinsen, J.S.Vaagen

Particle-Vibration Coupled States in ¹⁶¹Dy

NUCLEAR REACTIONS ¹⁶¹Dy(³He, ³He'), E=32 MeV; measured σ(E), Eγ, Iγ, ³Heγ-coin. ¹⁶¹Dy deduced levels, J, π. Particle-core model calculations. Ge, Si counters, enriched target.

doi: 10.1016/0375-9474(87)90121-7
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1987RE09      Nucl.Phys. A470, 397 (1987)

J.Rekstad, A.Atac, M.Guttormsen, T.Ramsoy, J.B.Olsen, F.Ingebretsen, T.F.Thorsteinsen, G.Lovhoiden, T.Rodland

Reaction Dependence and Cross Structure of the γ-Decay of Highly Excited States in the Rare Earth Nucleus ¹⁶²Dy

NUCLEAR REACTIONS ¹⁶³Dy(³He, α), ¹⁶²Dy(³He, ³He'), E=45 MeV; measured γ(particle)-coin. ¹⁶²Dy deduced yrast-transition characsteristics.

doi: 10.1016/0375-9474(87)90009-1
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1986GU03      Phys.Scr. 33, 385 (1986)

M.Guttormsen, A.Atac, F.Ingebretsen, S.Messelt, J.B.Olsen, T.Ramsoy, J.Rekstad, L.A.Ronning, G.Lovhoiden, T.Rodland, T.F.Thorsteinsen

Statistical γ-Decay in s-d Shell Nuclei

NUCLEAR REACTIONS ²⁷Al(³He, α), (³He, ³He'), (³He, t), E=45 MeV; measured σ(Eα), σ(E(³He')), σ(Et), γ(particle)-coin. ^26,27Al, ²⁷Si deduced γ-multiplicity. Fermi gas model.

doi: 10.1088/0031-8949/33/5/001
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1986RE18      Phys.Scr. 34, 644 (1986)

J.Rekstad, M.Guttormsen, A.Atac, F.Ingebretsen, S.Messelt, T.Ramsoy, T.F.Thorsteinsen, G.Lovhoiden, T.Rodland

Structure and Decay Properties of Low-Spin States at High Excitation Energy

NUCLEAR REACTIONS ^161,163Dy(d, t), E=15 MeV; measured σ(Et), Eγ, Iγ, γγ-coin. ^160,162Dy deduced levels, decay characteristics. Other data input, ΔE-E telescopes, Ge, NaI detectors.

doi: 10.1088/0031-8949/34/6A/020
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1985RA07      Nucl.Phys. A438, 301 (1985)

T.Ramsoy, J.Rekstad, M.Guttormsen, A.Henriquez, F.Ingebretsen, T.Rodland, T.F.Thorsteinsen, G.Lovhoiden

γ-Decay from Two-Quasiparticle States Populated in the ^161,163Dy(d, t) Reactions

NUCLEAR REACTIONS ^161,163Dy(d, t), E=15 MeV; measured σ(E(t)), Eγ, Iγ, γ(t). ^160,162Dy deduced levels, J, π, γ-multiplicity. Enriched targets.

doi: 10.1016/0375-9474(85)90377-X
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1984GU01      Phys.Rev.Lett. 52, 102 (1984)

M.Guttormsen, J.Rekstad, A.Henriquez, F.Ingebretsen, T.F.Thorsteinsen

Nonstatistical Cooling of the Highly Excited ¹⁶¹Dy Nucleus

NUCLEAR REACTIONS ¹⁶²Dy(³He, α), E=26 MeV; measured Eα, αγ-coin, Eγ. ¹⁶¹Dy deduced enhanced single-quasiparticle transitions, possible unstretched M1 transitions, statistical cooling competition.

doi: 10.1103/PhysRevLett.52.102
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1984LI02      Nucl.Phys. A412, 92 (1984)

J.R.Lien, G.Lovhoiden, J.Rekstad, A.Henriques, C.Gaarde, J.S.Larsen, S.Y.Van Der Werf

High-Spin Particle States in ¹⁵³Sm Studied with the (α, ³He) Reaction

NUCLEAR REACTIONS ¹⁵²Sm(α, ³He), E=40 MeV; measured σ(E(³He), θ). ¹⁵³Sm deduced levels, L, π, J. Enriched target.

doi: 10.1016/0375-9474(84)90386-5
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1984RA03      Nucl.Phys. A414, 269 (1984)

T.Ramsoy, J.Rekstad, A.Henriquez, F.Ingebretsen, M.Guttormsen, E.Hammaren, T.F.Thorsteinsen

Deep-Lying νh_11/2 Hole States in ¹⁴⁵Nd

NUCLEAR REACTIONS ¹⁴⁶Nd(³He, α), E=26 MeV; measured σ(Eγ, θ), Eγ, Iγ, γα-coin. ¹⁴⁵Nd deduced levels, γ-ray multiplicity, level density, spectroscopic strength. Enriched target, Ge(Li), NaI(Tl), Si detectors. Fermi gas model analysis.

doi: 10.1016/0375-9474(84)90644-4
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1984RE04      Nucl.Phys. A417, 376 (1984)

J.Rekstad, B.Nordmoen, A.Henriques, F.Ingebretsen, S.Messelt, T.F.Thorsteinsen, E.Hammaren

The (³He, α) Strength Functions in Rare-Earth Nuclei

NUCLEAR REACTIONS ^156,157Gd, ¹⁷¹Yb(³He, α), E=26 MeV; measured σ(Eα, θ), αγ-coin. ^155,156Gd, ¹⁷⁰Yb levels deduced L, J, π, S. Enriched targets. DWBA calculations. Comparison to particle-plus-rotor model.

doi: 10.1016/0375-9474(84)90403-2
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1983AA01      Phys.Rev. C28, 1857 (1983)

R.M.Aasen, J.Rekstad, A.Henriquez, F.Ingebretsen, M.Guttormsen, T.Engeland

Gamma-Ray Energy Dependence of Transition Probabilities in the Continuum

NUCLEAR REACTIONS ¹⁴⁹Sm(³He, α), E=26 MeV; measured σ(E(α)), γα-coin. ¹⁴⁸Sm deduced γ-ray multiplicity. Enriched target, Ge(Li), NaI(Tl), Si detectors. Fermi gas model analysis.

doi: 10.1103/PhysRevC.28.1857
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1983EN01      Phys.Lett. 120B, 19 (1983)

T.Engeland, A.Henriquez, J.Rekstad

The Coriolis Attenuation Problem in the Perturbed i_13/2 Neutron Bands

NUCLEAR STRUCTURE ¹⁵¹Sm, ¹⁵³Gd, ¹⁶³Er, ¹⁸¹W; calculated levels, quasiparticle energies, Coriolis attentuation factors; deduced Coriolis coupling BCS approximation dependence. Pairing plus recoil model.

doi: 10.1016/0370-2693(83)90613-5
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1983HE03      Phys.Rev. C27, 1302 (1983)

A.Henriquez, T.Engeland, J.Rekstad

Particle-Rotor Model Calculation of ¹⁰⁹Pd

NUCLEAR STRUCTURE ¹⁰⁹Pd; calculated levels. Particle-rotor model, no Coriolis attennuation.

doi: 10.1103/PhysRevC.27.1302
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1983HE19      Phys.Lett. 130B, 171 (1983)

A.Henriquez, J.Rekstad, F.Ingebretsen, M.Guttormsen, K.Eldhuset, B.Nordmoen, T.Ramsoy, R.Renstrom-Pedersen, R.M.Aasen

The Decay from the Two-Quasiparticle Regime in Even-Even Deformed Rare Earth Nuclei

NUCLEAR REACTIONS ¹⁷¹Yb, ¹⁶¹Dy(³He, α), E=26 MeV; measured Eγ, Iγ, αγ-coin, αγ(θ). ¹⁷⁰Yb, ¹⁶⁰Dy deduced ground state band transition, dipole character, initial, final state configurations. Two-quasiparticle scheme.

doi: 10.1016/0370-2693(83)91035-3
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1983HE22      Nucl.Phys. A410, 1 (1983)

A.Henriquez, T.Engeland, J.Rekstad

The Coriolis Attenuation Problem in ²³⁵U

NUCLEAR STRUCTURE ²³⁵U; calculated levels, B(E2). Particle-rotor model, Coriolis attenuation.

doi: 10.1016/0375-9474(83)90397-4
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1983RE09      Phys.Scr. T5, 45 (1983)

J.Rekstad, A.Henriquez, F.Ingebretsen, G.Midttun, B.Skaali, R.Oyan, J.Wikne, T.Engeland, T.G.Thorsteinsen, E.Hammaren, E.Liukkonen

A Study of the Nuclear Structure at High Energy and Low Spin

NUCLEAR REACTIONS ^147,149Sm, ^155,157Gd, ^161,163Dy(³He, α), E=26 MeV; measured Eα, Iα, γα-coin, γ-multiplicity spectra; deduced structure change in deformed nuclei. ^146,148Sm, ¹⁵⁶Gd, ^160,162Dy deduced < Eγ > vs excitation energy. ¹⁵⁴Gd deduced < Eγ > vs excitation energy, γ-transition relative intensities.

doi: 10.1088/0031-8949/1983/T5/007
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1982HA27      Phys.Rev. C25, 3224 (1982)

G.B.Hagemann, J.D.Garrett, B.Herskind, G.Sletten, P.O.Tjom, A.Henriquez, F.Ingebretsen, J.Rekstad, G.Lovhoiden, T.F.Thorsteinsen

Evidence for Signature-Dependent Transition Rates at Large Rotational Frequencies

NUCLEAR REACTIONS ¹⁴⁶Nd(¹⁵N, 4n), E=74 MeV; measured Iγ(θ), γγ-coin. ¹⁵⁷Ho deduced levels, J, π, δ, branching ratios, (g(k)-g(R)), shape change.

doi: 10.1103/PhysRevC.25.3224
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1982RE16      Phys.Lett. 117B, 384 (1982)

J.Rekstad, A.Henriquez, F.Ingebretsen, G.Midttun, B.Skaali, R.Oyan, R.Haugland, S.Messelt, T.F.Thorsteinsen, G.Lovhoiden, L.P.Ekstrom

The Variation in γ-Ray Multiplicity with Nuclear Temperature Studied in ¹⁶⁰Dy

NUCLEAR REACTIONS ¹⁶¹Dy(³He, α), E=26 MeV; measured σ(Eα), αγ-coin, γ multiplicity. ¹⁶⁰Dy deduced level density parameter.

doi: 10.1016/0370-2693(82)90564-0
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1981JI01      Phys.Rev.Lett. 46, 222 (1981)

G.-M.Jin, J.D.Garrett, G.Lovhoiden, T.F.Thorsteinsen, J.C.Waddington, J.Rekstad

Candidates for Low-Spin Members of the S Band in ¹⁶⁰Dy

NUCLEAR REACTIONS ^161,162Dy(³He, α), E=24 MeV; measured σ(Eα, θ). ¹⁶⁰Dy deduced levels, J, π, L, configuration, rotational band structure.

doi: 10.1103/PhysRevLett.46.222
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1981LO14      Nucl.Phys. A369, 461 (1981)

G.Lovhoiden, J.R.Lien, J.C.Waddington, J.Rekstad, I.Espe, C.Gaarde, J.S.Larsen, S.van der Werf

High-Spin Particle States in ¹⁵¹Sm Studied with the (α, ³He) Reaction

NUCLEAR REACTIONS ¹⁵⁰Sm(α, ³He), E=40 MeV; measured σ(E(³He), θ). ¹⁵¹Sm deduced levels, J, π, S. QMG/2 spectrometer. DWBA analysis, Coriolis coupling calculation.

doi: 10.1016/0375-9474(81)90031-2
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1981RE10      Nucl.Phys. A369, 453 (1981)

J.Rekstad, I.Espe, G.Lovhoiden, J.R.Lien, J.C.Waddington, C.Gaarde, J.S.Larsen, S.van der Werf

An Investigation of the ¹⁴⁴Sm(α, ³He)¹⁴⁵Sm Reaction

NUCLEAR REACTIONS ¹⁴⁴Sm(α, ³He), E=40 MeV; measured σ(E(³He), θ). ¹⁴⁵Sm deduced levels, L, π, S. Enriched target.

doi: 10.1016/0375-9474(81)90030-0
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1981RE11      Nucl.Phys. A371, 364 (1981)

J.Rekstad, P.Boe, A.Henriquez, R.Oyan, M.Guttormsen, T.Engeland, G.Lovhoiden

The Level Structure of the ¹⁵³Gd Nucleus Studied in the ¹⁵⁰Sm(α, n)¹⁵³Gd Reaction

NUCLEAR REACTIONS ¹⁵⁰Sm(α, n), E=17, 19 MeV; measured Eγ, Iγ, γγ-coin, γ-multiplicities. ¹⁵³Gd deduced levels, J, π, K. Enriched target, Ge(Li), NaI detectors.

doi: 10.1016/0375-9474(81)90052-X
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1980GU01      Nucl.Phys. A334, 401 (1980)

M.Guttormsen, J.Rekstad, A.Henriquez, G.Lovhoiden, O.Straume

On the ΔN = 2 Coupling Problem

NUCLEAR STRUCTURE ¹⁵³Sm, ^{155,157,159,161,163}Dy; calculated levels, pick-up, stripping S. Particle-rotor Hamiltonian, Δn=2 coupling.

doi: 10.1016/0375-9474(80)90607-7
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1980GU07      Nucl.Phys. A338, 141 (1980)

M.Guttormsen, T.Pedersen, J.Rekstad, T.Engeland, E.Osnes, F.Ingebretsen

The Particle-Rotor Model with Pairing in the s-d Shell. An Analysis Of the ²³Na Nucleus

NUCLEAR STRUCTURE ²³Na; calculated stripping, pickup S, levels, T_1/2, B(λ). Particle-rotor model, pairing effects.

doi: 10.1016/0375-9474(80)90126-8
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1980GU13      Phys.Scr. 22, 210 (1980)

M.Guttormsen, J.Rekstad, L.L.Riedinger

The β-Band and the Octupole Band in ¹⁵²Gd

NUCLEAR REACTIONS ¹⁵⁰Sm(α, 2n), E=19, 27 MeV; measured Eγ, Iγ, γγ-coin, γ(θ). ¹⁵²Gd deduced levels, J, π, band structure, rotational band frequency.

doi: 10.1088/0031-8949/22/3/005
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1980LO06      Nucl.Phys. A339, 477 (1980)

G.Lovhoiden, J.R.Lien, S.El-Kazzaz, J.Rekstad, C.Ellegaard, J.H.Bjerregaard, P.Knudsen, P.Kleinheinz

Studies of Single Neutron Holes in the Transitional Nuclei N = 83-89: The ^150,148Nd(d, t) and ^150,148,146Nd(³He, α) Pick-up Reactions

NUCLEAR REACTIONS ^148,150Nd(d, t), E=17 MeV; measured σ(Et, θ). ^146,148,150Nd(³He, α), E=24 MeV; measured σ(Eα, θ). ^145,147,149Nd deduced levels, L, J. Enriched targets.

doi: 10.1016/0375-9474(80)90028-7
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1980RE05      Nucl.Phys. A348, 93 (1980)

J.Rekstad, G.Lovhoiden, J.R.Lien, S.El Kazzaz, C.Ellegaard, J.Bjerregaard, P.Knudsen, P.Kleinheinz

Studies of Single-Neutron Holes in the Transitional Nuclei N = 83-89: The ^148,150,152Sm(³He, α) pick-up reactions

NUCLEAR REACTIONS ^148,150,152Sm(³He, α), E=24 MeV; measured σ(Eα, θ). ^147,149,151Sm deduced levels, L, π, S. Enriched targets.

doi: 10.1016/0375-9474(80)90547-3
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1979LI12      Nucl.Phys. A324, 141 (1979)

J.R.Lien, G.Lovhoiden, K.Aareskjold, S.El Kazzaz, C.Ellegaard, K.Heyde, M.Waroquier, P.Van Isacker, H.Vincx, J.R.Rekstad, P.Kleinheinz

Studies of Single-Neutron Holes in the Transitional Nuclei N = 83-89: The ¹⁴²Ce(d, t)¹⁴¹Ce and ¹⁴²Ce(³He, α)¹⁴¹Ce Pick-up Rections

NUCLEAR REACTIONS ¹⁴²Ce(d, t), E=17 MeV; ¹⁴²Ce(³He, α), E=24 MeV; measured σ(Et, θ), σ(Eα, θ). ¹⁴¹Ce deduced levels, L, π, S. Enriched target. Unified model calculations.

doi: 10.1016/0375-9474(79)90084-8
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1979RE04      Nucl.Phys. A320, 239 (1979)

J.Rekstad, M.Guttormsen, T.Engeland, G.Lovhoiden, O.Straume, J.Lien, C.E.Ellegaard

The ¹⁵³Sm Nucleus: An Experimental and Theoretical Study

NUCLEAR REACTIONS ¹⁵⁰Nd(α, n), E=14-22 MeV; measured Eγ, Iγ, γγ-coin. ¹⁵³Sm deduced levels, J, π, K. Enriched target. Ge(Li) detectors.

doi: 10.1016/0375-9474(79)90187-8
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1979RE10      Nucl.Phys. A330, 367 (1979)

J.Rekstad, T.Engeland, E.Osnes

Evidence for the Two-body Nature of the Recoil Term in the Particle-Rotor Model

NUCLEAR STRUCTURE ^{150,151,152,153,154,155,156,157,158,159,160}Gd, ^{64,65,66,67,68,69,70,71}Zn, ^{70,71,72,73,74,75,76,77}Ge; calculated recoil energy. Particle-rotor model, two-body part of recoil term.

doi: 10.1016/0375-9474(79)90060-5
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1978BJ01      Nucl.Phys. A302, 173 (1978)

J.H.Bjerregaard, C.Ellegaard, P.Knudsen, J.R.Lien, G.Lovhoiden, J.Rekstad

Direct Population of Collective States in ²⁰⁵Pb

NUCLEAR REACTIONS ²⁰⁵Pb(d, d'), E=14, 17 MeV; measured σ(Ed, θ). ²⁰⁵Pb deduced levels, β(L) values. Enriched radioactive target.

doi: 10.1016/0375-9474(78)90293-2
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1978GU11      Nucl.Phys. A298, 122 (1978)

M.Guttormsen, E.Osnes, J.Rekstad, G.Lovhoiden, O.Straume

Particle-Rotor Model Description of the Negative-Parity States in the Transitional ¹⁵¹Sm Nucleus

NUCLEAR STRUCTURE ¹⁵¹Sm; calculated levels, B(λ), S.

doi: 10.1016/0375-9474(78)90011-8
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1977EL02      Nucl.Phys. A280, 1 (1977)

S.El-Kazzaz, J.R.Lien, G.Lovhoiden, P.Kleinheinz, C.Ellegaard, J.Bjerregaard, P.Knudsen, J.Rekstad

A Study of Levels in ¹⁴¹Nd with the (d, t) and (³He, α) Reactions

NUCLEAR REACTIONS ¹⁴²Nd(d, t), E=17 MeV; measured σ(Et, θ). ¹⁴²Nd(³He, α), E=24.0 MeV; measured σ(Eα, θ). ¹⁴¹Nd deduced levels, L, S. Enriched targets.

doi: 10.1016/0375-9474(77)90289-5
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Note: The following list of authors and aliases matches the search parameter J.Rekstad: , J.B.REKSTAD, J.R.REKSTAD