NSR Query Results

Output year order : Descending
Format : Normal

NSR database version of April 27, 2024.

Search: Author = L.Bergholt

Found 19 matches.

Back to query form

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

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

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
Citations: PlumX Metrics

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
Citations: PlumX Metrics

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
Citations: PlumX Metrics

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
Citations: PlumX Metrics

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
Citations: PlumX Metrics

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
Citations: PlumX Metrics

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
Citations: PlumX Metrics

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
Citations: PlumX Metrics

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.

1994AV06      Nucl.Instrum.Methods Phys.Res. A349, 216 (1994)

V.V.Avdeichikov, L.Bergholt, M.Guttormsen, J.E.Taylor, L.Westerberg, B.Jakobsson, W.Klamra, Yu.A.Murin

Light Output and Energy Resolution of CsI, YAG, GSO, BGO and LSO Scintillators for Light Ions

NUCLEAR REACTIONS ¹⁹⁷Au, C, ^2,1H(p, X), (d, X), (³He, X), E=3-20 MeV/nucleon; measured detectors light output, energy resolution. CsI(Tl), YAG(Ce), GSO(Ce), BGO, LSO(Ce) scintillators.

doi: 10.1016/0168-9002(94)90623-8
Citations: PlumX Metrics

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
Citations: PlumX Metrics

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
Citations: PlumX Metrics

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
Citations: PlumX Metrics