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NSR database version of May 24, 2024.

Search: Author = A.Petrovici

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2024PE04      Phys.Rev. C 109, 024303 (2024)

A.Petrovici

Shape coexistence and first-forbidden decay of 92Rb to 92Sr

doi: 10.1103/PhysRevC.109.024303
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2022MA54      Phys.Rev. C 106, 054306 (2022)

A.S.Mare, A.Petrovici

Shape coexistence and isomeric states in 94Pd within a beyond-mean-field approach

NUCLEAR STRUCTURE 94Pd; calculated levels, J, π, B(E2), B(M1), E0 transition strength, spectroscopic quadrupole moments, occupation of the 1p1/2, 1p3/2, 1d5/2, and 0g9/2 valence spherical orbitals for the yrast band and lowest three 6+, 8+ states. 94Ag; calculated levels, J, π. Calculations within the beyond-mean-field complex excited Vampir model using an effective interaction derived from a nuclear matter G matrix based on the charge dependent Bonn CD potential in a large model space. Comparison to experimental results.

RADIOACTIVITY 94,94mAg(β+); calculated Fermi strength distribution for the decay of the 0+ ground state, Gamow-Teller strength distribution for the decay of the 7+ isomer to 6+ and 8+ states in 94Pd, Gamow-Teller accumulated strength, T1/2. Comparison to experimental results.

doi: 10.1103/PhysRevC.106.054306
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2022MI15      Phys.Rev. C 106, 024332 (2022)

R.E.Mihai, A.S.Mare, N.Marginean, A.Petrovici, O.Andrei, M.Boromiza, D.Bucurescu, G.Cata-Danil, C.Clisu, C.Costache, I.Dinescu, D.Filipescu, N.Florea, I.Gheorghe, A.Ionescu, R.Lica, R.Marginean, C.Mihai, A.Mitu, A.Negret, C.R.Nita, A.Olacel, A.Oprea, S.Pascu, A.Serban, C.Sotty, L.Stan, R.Suvaila, S.Toma, A.Turturica, S.Ujeniuc, C.A.Ur

Search for isospin-symmetry breaking in the A=62 isovector triplet

NUCLEAR REACTIONS 58Ni(6Li, 2n)62Ga, E=22 MeV; measured Eγ, Iγ, nγ-coin, (2n)γ-coin, γ(θ) using ROSPHERE array with ten Compton-suppressed HPGe detectors and 11 LaBr3(Ce) detectors for γ rays, and two liquid scintillator neutron detector walls with 12 detectors each neutrons at the IFIN-HH 9-MV Tandem accelerator. 62Ga; deduced levels, J, π, first 2+ state, multipolarities. Comparison with beyond-mean-field complex excited Vampir variational model. Discussed Coulomb energy differences (CED), mirror energy differences (MED), triplet energy differences (TED) for A=62 triplet. 59Ni, 62Cu, 62Zn; observed γ rays.

NUCLEAR STRUCTURE 62Ge, 62Ga, 62Zn; calculated energies of low-lying 0+, 2+ and 4+ analog states, B(E2) for 62Zn, superallowed Fermi β decay strength distribution from 62Ga decay to 62Ge g.s., and compared with available experimental values.

doi: 10.1103/PhysRevC.106.024332
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2022VI03      Phys.Lett. B 830, 137123 (2022)

A.Vitez-Sveiczer, A.Algora, A.I.Morales, B.Rubio, G.G.Kiss, P.Sarriguren, P.Van Isacker, G.de Angelis, F.Recchia, S.Nishimura, J.Agramunt, V.Guadilla, A.Montaner-Piza, S.E.A.Orrigo, A.Horvath, D.Napoli, S.Lenzi, A.Boso, V.H.Phong, J.Wu, P.-A.Soderstrom, T.Sumikama, H.Suzuki, H.Takeda, D.S.Ahn, H.Baba, P.Doornebal, N.Fukuda, N.Inabe, T.Isobe, T.Kubo, S.Kubono, H.Sakurai, Y.Shimizu, C.Sidong, B.Blank, P.Ascher, M.Gerbaux, T.Goigoux, J.Giovinazzo, S.Grevy, T.Kurtukian Nieto, C.Magron, W.Gelletly, Zs.Dombradi, Y.Fujita, M.Tanaka, P.Aguilera, F.Molina, J.Eberth, F.Diel, D.Lubos, C.Borcea, E.Ganioglu, D.Nishimura, H.Oikawa, Y.Takei, S.Yagi, W.Korten, G.de France, P.Davies, J.Liu, J.Lee, T.Lokotko, I.Kojouharov, N.Kurz, H.Shaffner, A.Petrovici

The β-decay of 70Kr into 70Br: Restoration of the pseudo-SU(4) symmetry

RADIOACTIVITY 70Kr(EC), (β+p) [from 9Be(78Kr, X), E=345 MeV/nucleon]; measured decay products, Eγ, Iγ; deduced γ-ray energies, partial level scheme, T1/2, log ft, B(GT), β-delayed proton emission probability, an approximate realization of pseudo-SU(4) symmetry in the system. Comparison with the proton-neutron quasiparticle random-phase approximation (pnQRPA) calculations. The Radioactive Ion Beam Factory (RIBF) of the RIKEN Nishina Center using the BigRIPS fragment separator, the ZeroDegree Spectrometer, the WAS3ABI implantation station and the EURICA HPGe cluster array.

doi: 10.1016/j.physletb.2022.137123
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2020PE03      Phys.Rev. C 101, 024307 (2020)

A.Petrovici, A.S.Mare

Triple shape coexistence and β decay of 96Y to 96Zr

RADIOACTIVITY 96,96mY(β-); calculated first-forbidden beta decay of the 0- ground state and Gamow-Teller strengths for beta decay of the 8+ isomer using the beyond-mean-field complex Excited Vampir model. 96Zr; calculated E0 transition strengths of the 0+ states. Discussed influence of triple shape coexistence and mixing on the beta decay and E0 transitions. Comparison with experimental results.

doi: 10.1103/PhysRevC.101.024307
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2019PE11      Phys.Rev. C 100, 015810 (2019)

A.Petrovici, A.S.Mare, O.Andrei, B.S.Meyer

Impact of 68Se and 72Kr stellar weak interaction rates on rp-process nucleosynthesis and energetics

RADIOACTIVITY 68Se, 72Kr(β+), (EC); calculated stellar weak interaction rates of ground state and low-lying excited states using the beyond-mean-field complex excited Vampir model. Discussed impact on rp-process nucleosynthesis in type-I x-ray bursts and energetics.

doi: 10.1103/PhysRevC.100.015810
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2018PE03      Phys.Rev. C 97, 024313 (2018)

A.Petrovici

Shape coexistence and b decay of 70Br within a beyond-mean-field approach

NUCLEAR STRUCTURE 70Se; calculated levels, J, π, bands, B(E2), mixing for the lowest 8+ and 10+ states, spectroscopic quadrupole moments for 8+ and 10+ states using complex excited VAMPIR (Variation After Mean field Projection In Realistic model spaces) model. Comparison with experimental data.

RADIOACTIVITY 70,70mBr(β+), (EC); calculated Fermi strength distribution for the superallowed decay of 70Br ground state to 70Se, and Gamow-Teller (B(GT)) strength distribution for the decay the 9+ isomer in 70Br to 8+ and 10+ states in 70Se within the complex excited VAMPIR model, summed B(GT) strength to 8+ and 10+ states. Comparison with available experimental data.

doi: 10.1103/PhysRevC.97.024313
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2018PE13      Phys.Scr. 93, 114001 (2018)

A.Petrovici, O.Andrei, A.Chilug

Exotic phenomena in medium mass N ∼ Z nuclei within the beyond-mean-field approach

NUCLEAR STRUCTURE 70Se, 70Br, 70,74Kr, 74Rb, 74Sr; analyzed available data; deduced spectroscopic quadrupole moments of 1+ Gamow–Teller daughter states, shape coexistence, J, π. Comparison with the beyond-mean-field complex Excited Vampir model calculations.

doi: 10.1088/1402-4896/aadec5
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2017IS03      Europhys.Lett. 117, 12001 (2017)

L.W.Iskra, B.Fornal, S.Leoni, G.Bocchi, A.Petrovici, C.Porzio, A.Blanc, G.De France, M.Jentschel, U.Koster, P.Mutti, J.-M.Regis, G.Simpson, T.Soldner, C.A.Ur, W.Urban, D.Bazzacco, G.Benzoni, S.Bottoni, A.Bruce, N.Cieplicka-Orynczak, F.C.L.Crespi, L.M.Fraile, W.Korten, T.Kroll, S.Lalkovski, N.Marginean, C.Michelagnoli, B.Melon, D.Mengoni, B.Million, A.Nannini, D.Napoli, Zs.Podolyak, P.H.Regan, B.Szpak

New isomer in 96Y marking the onset of deformation at N = 57

NUCLEAR REACTIONS 235U, 241Pu(n, X)96Y, E thermal; measured reaction products, Eγ, Iγ; deduced γ-ray energies, intensities, J, π, isomer T1/2, negative parity states B(E2). Comparison with theoretical calculations.

doi: 10.1209/0295-5075/117/12001
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2017KO03      Phys.Rev. C 95, 014309 (2017)

T.Konstantinopoulos, P.Petkov, A.Goasduff, T.Arici, A.Astier, L.Atanasova, M.Axiotis, D.Bonatsos, P.Detistov, A.Dewald, M.J.Eller, V.Foteinou, A.Gargano, G.Georgiev, K.Gladnishki, A.Gottardo, S.Harissopulos, H.Hess, S.Kaim, D.Kocheva, A.Kusoglu, A.Lagoyannis, J.Ljungvall, R.Lutter, I.Matea, B.Melon, T.J.Mertzimekis, A.Nannini, C.M.Petrache, A.Petrovici, G.Provatas, P.Reiter, M.Rocchini, S.Roccia, M.Seidlitz, B.Siebeck, D.Suzuki, N.Warr, H.De Witte, T.Zerrouki

Lifetime measurements in 100Ru

NUCLEAR REACTIONS 88Sr(14C, 2n), E=40, 46 MeV; measured Eγ, half-lives of 2+, 4+, 6+ and 8+ yrast levels by recoil-distance Doppler shift (RDDS) and Doppler-shift attenuation method (DSAM) using ORGAM array and eight detectors from Miniball array at 15 MV Tandem accelerator of the ALTO laboratory in Orsay. 100Ru; deduced levels, B(E2), not the best candidate for E(5) symmetry. Comparison with excited Vampir, shell-model calculations, and theoretical E(5) level scheme.

doi: 10.1103/PhysRevC.95.014309
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2017PE07      Phys.Scr. 92, 064003 (2017)

A.Petrovici

Shape evolution in proton-rich and neutron-rich Kr isotopes within the beyond-mean-field approach

NUCLEAR STRUCTURE 70,94Kr; calculated energy levels, J, π, spectroscopic quadrupole moments. The framework of the complex excited Vampir beyond-mean-field model based on the effective interaction derived from a G-matrix starting from the charge-dependent Bonn CD potential and rather large model spaces.

doi: 10.1088/1402-4896/aa6d2f
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2015PE01      Phys.Rev. C 91, 014302 (2015)

A.Petrovici

Isospin-symmetry breaking and shape coexistence in A≈70 analogs

NUCLEAR STRUCTURE 70Se, 70Br, 70Kr, 74Kr, 74Rb, 74Sr; calculated levels, J, π, amount of mixing for the lowest complex excited VAMPIR states, spectroscopic quadrupole moments for the lowest EXVAM states, occupation of valence spherical orbitals for the analog states. Isospin-symmetry-breaking and shape-coexistence effects. Self-consistent beyond-mean-field complex excited VAMPIR variational model for Coulomb energy differences (CED), mirror energy differences (MED), triplet energy differences (TED), and triplet displacement energy (TDE). Comparison with experimental data.

doi: 10.1103/PhysRevC.91.014302
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2015PE13      Eur.Phys.J. A 51, 133 (2015)

A.Petrovici, O.Andrei

Stellar weak interaction rates and shape coexistence for 68Se and 72Kr waiting points

RADIOACTIVITY 68Se, 72Kr(β+), (EC); calculated β-decay GT strength distribution, cumulative strength for specified decays, decay rates, T1/2 vs temperature, spectroscopic quadrupole moments of discrete states of daughter nuclei using complex Excited Vampir model with different interactions.

doi: 10.1140/epja/i2015-15133-9
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2015PE16      Phys.Rev. C 92, 064305 (2015)

A.Petrovici, O.Andrei

Weak interaction rates and shape coexistence for the Z = N + 2 isotopes 70Kr and 74Sr

RADIOACTIVITY 70Kr, 74Sr(EC), (β+); calculated Gamow-Teller accumulated strengths for the decay of the ground state, first excited 0+, and yrast 2+ state, Fermi β-decay rates for the ground state and yrast 2+ state, and half-lives of 70Kr and 74Sr as a function of density and temperature of T9=1-10. Beyond-mean-field complex excited Vampir variational model with an interaction from a G matrix based on Bonn CD potential. Shape mixing on weak interaction rates. Relevance to decay half-lives in x-ray burst astrophysical environment.

NUCLEAR MOMENTS 70Br, 74Rb; calculated spectroscopic quadrupole moments for 1+ and 3+ Gamow-Teller states populated in β+, ϵ decay of 70Kr and 74Sr using complex excited Vampir model.

doi: 10.1103/PhysRevC.92.064305
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2013JO02      Phys.Rev. C 87, 044318 (2013)

D.Jordan, A.Algora, J.L.Tain, B.Rubio, J.Agramunt, A.B.Perez-Cerdan, F.Molina, L.Caballero, E.Nacher, A.Krasznahorkay, M.D.Hunyadi, J.Gulyas, A.Vitez, M.Csatlos, L.Csige, J.Aysto, H.Penttila, I.D.Moore, T.Eronen, A.Jokinen, A.Nieminen, J.Hakala, P.Karvonen, A.Kankainen, A.Saastamoinen, J.Rissanen, T.Kessler, C.Weber, J.Ronkainen, S.Rahaman, V.Elomaa, U.Hager, S.Rinta-Antila, T.Sonoda, K.Burkard, W.Huller, L.Batist, W.Gelletly, A.L.Nichols, T.Yoshida, A.A.Sonzogni, K.Perajarvi, A.Petrovici, K.W.Schmid, A.Faessler

Total absorption study of the β decay of 102, 104, 105Tc

RADIOACTIVITY 102,104,105Tc(β-)[from U(p, F), E=30, 50 MeV followed by mass separation]; measured Eγ, Iγ using the Total Absorption Gamma Spectrometer (TAGS) and JYFLTRAP Penning trap at IGISOL, Jyvaskyla facility; deduced β feedings to levels in 102,104,105Ru, β-strength distributions, Gamow-Teller strengths, average β and γ energies, effects on decay heat calculations. Comparison of deduced β feedings with those from high-resolution γ-ray measurements. Comparison of Gamow-Teller strengths with VAMPIR model calculations. Relevance to decay heat calculations in nuclear reactors.

NUCLEAR REACTIONS U(p, F)102Mo/102Tc/102Ru/104Tc/105Nb/ 105Mo/105Tc/105Ru, E=30, 50 MeV; measured yields using JYFLRTRAP Penning trap at IGISOL, Jyvaskyla facility.

doi: 10.1103/PhysRevC.87.044318
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2012DE05      Phys.Rev. C 85, 034320 (2012)

G.de Angelis, K.T.Wiedemann, T.Martinez, R.Orlandi, A.Petrovici, E.Sahin, J.J.Valiente-Dobon, D.Tonev, S.Lunardi, B.S.Nara Singh, R.Wadsworth, A.Gadea, K.Kaneko, P.G.Bizzeti, A.M.Bizzeti-Sona, B.Blank, A.Bracco, M.P.Carpenter, C.J.Chiara, E.Farnea, A.Gottardo, J.P.Greene, S.M.Lenzi, S.Leoni, C.J.Lister, D.Mengoni, D.R.Napoli, O.L.Pechenaya, F.Recchia, W.Reviol, D.G.Sarantites, D.Seweryniak, C.A.Ur, S.Zhu

Shape isomerism and shape coexistence effects on the Coulomb energy differences in the N=Z nucleus 66As and neighboring T=1 multiplets

NUCLEAR REACTIONS 40Ca(32S, npα)66As, E=90 MeV; measured Eγ, Iγ, γ(θ), angular asymmetry ratios, (particle)nγ-, γγ-coin, particle and neutron spectra, isomer half-life using Gammasphere array at ATLAS facility. 66As; deduced levels, J, π, shape isomer, B(E2), isospin=1 states, Coulomb energy differences (CED); calculated neutron single-particle energies. Breaking of isospin symmetry and correlations induced by the Coulomb interaction. Comparison with shell model and Complex excited Vampir calculations.

doi: 10.1103/PhysRevC.85.034320
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2012PE04      Phys.Rev. C 85, 034337 (2012)

A.Petrovici

Triple shape coexistence and shape evolution in the N=58 Sr and Zr isotopes

NUCLEAR STRUCTURE 96Sr, 98Zr; calculated high-spin levels, J, π, oblate-prolate mixing of lowest 2+ and 4+ levels, wavefunctions for four lowest 0+ states, occupation of valence orbitals, B(E2), E0 strengths, quadrupole moments. Complex excited VAMPIR approach using a realistic effective interaction based on Bonn A potential in a large model space. Comparison with experimental data.

doi: 10.1103/PhysRevC.85.034337
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2011PE04      Prog.Part.Nucl.Phys. 66, 287 (2011)

A.Petrovici, K.W.Schmid, A.Faessler

Beyond mean field approach to the beta decay of medium mass nuclei relevant for nuclear astrophysics

RADIOACTIVITY 68Se, 72Kr(EC); calculated Gamow-Teller accumulated strength, T1/2, β-delayed neutron emission probabilities. Excited Vampir approach.

doi: 10.1016/j.ppnp.2011.01.022
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2011PE35      J.Phys.:Conf.Ser. 312, 092051 (2011)

A.Petrovici, K.W.Schmid, A.Faessler

Self-consistent description of shape coexistence in the A ≈ 100 Zr nuclei

NUCLEAR STRUCTURE 98,100,104,106,110Zr; calculated levels, J, π, deformation, shape coexistence, rotational band, band mixing, alignment, 98,100Zr B(E2), quadrupole moment using EVAM (complex excited Vampir model) HFB code with realistic effective interaction. Compared to available data.

doi: 10.1088/1742-6596/312/9/092051
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2009PE20      Phys.Rev. C 80, 044319 (2009)

A.Petrovici, K.W.Schmid, O.Andrei, A.Faessler

Variational approach to the Gamow-Teller β decay of the rp-process waiting point nucleus 68Se going beyond mean field calculations

RADIOACTIVITY 68Se(β+), (EC); calculated B(GT) strength distributions, accumulated B(GT) strengths, half-lives, and configuration mixing of lowest 0+ parent states of 68Se using VAMPIR variational approach. Comparison with experimental data.

NUCLEAR STRUCTURE 68As; calculated configuration mixing of lowest 1+ states with significant B(GT) strengths and spectroscopic quadrupole moments using VAMPIR variational approach with Bonn A and Bonn CD potentials.

doi: 10.1103/PhysRevC.80.044319
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2008PE01      Nucl.Phys. A799, 94 (2008)

A.Petrovici, K.W.Schmid, O.Radu, A.Faessler

Gamow-Teller β decay of 74Kr in a self-consistent approach

NUCLEAR STRUCTURE 74Br, 74Kr; calculated oblate/prolate deformation mixing, Gamow-Teller strength distribution, spectroscopic quadrupole moments using HFB, excited vampir calculations. Comparison with data.

doi: 10.1016/j.nuclphysa.2007.11.005
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2008PE27      Phys.Rev. C 78, 044315 (2008)

A.Petrovici, K.W.Schmid, O.Radu, A.Faessler

Self-consistent approach to the Gamow-Teller β decay of 72Kr

RADIOACTIVITY 72Kr(β+); calculated mixing for lowest 1+ states in 72Br, B(GT), spectroscopic quadrupole moments. Complex excited VAMPIR variational approach using large model sphere.

doi: 10.1103/PhysRevC.78.044315
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2008PE30      Phys.Rev. C 78, 064311 (2008)

A.Petrovici, K.W.Schmid, O.Radu, A.Faessler

Structure of A = 82 analogs and isospin-symmetry-breaking effects on superallowed Fermi β decay

RADIOACTIVITY 82Nb(β+); calculated B(E2), quadrupole moments, bands. 82Nb, 82Zr; calculated levels, J, π. VAMPIR approach. Comparison with experimental data.

doi: 10.1103/PhysRevC.78.064311
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2008PE31      Int.J.Mod.Phys. E17, Supplement 1, 219 (2008)

A.Petrovici

Self-consistent description of exotic structure and decay near the N = Z line

NUCLEAR STRUCTURE 82Nb, 82Zr, 72Kr, 72Br; calculated Gamow-Teller accumulated strength for the β-decay. Complex Excited Vampir approach.

doi: 10.1142/S0218301308011872
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2006BE18      Nucl.Phys. A770, 107 (2006)

F.Becker, A.Petrovici, J.Iwanicki, N.Amzal, W.Korten, K.Hauschild, A.Hurstel, Ch.Theisen, P.A.Butler, R.A.Cunningham, T.Czosnyka, G.de France, J.Gerl, P.Greenlees, K.Helariutta, R.-D.Herzberg, P.Jones, R.Julin, S.Juutinen, H.Kankaanpaa, M.Muikku, P.Nieminen, O.Radu, P.Rahkila, Ch.Schlegel

Coulomb excitation of 78Kr

NUCLEAR REACTIONS 26Mg, 48Ti, 208Pb(78Kr, 78Kr'), E=180, 200, 350 MeV; measured Eγ, Iγ, (particle)γ-coin following projectile Coulomb excitation. 78Kr deduced levels, J, π, B(E2), B(M1), quadrupole moments, deformation parameters. Comparison with model predictions.

doi: 10.1016/j.nuclphysa.2006.01.018
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2006PE03      J.Phys.(London) G32, 583 (2006)

A.Petrovici, K.W.Schmid, O.Radu, A.Faessler

Shape coexistence effects in 78Kr

NUCLEAR STRUCTURE 78Kr; calculated level energies, J, π, configurations, B(E2), B(M1), rotational bands, shape coexistence features.

doi: 10.1088/0954-3899/32/4/014
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2006PE12      Eur.Phys.J. A 28, 19 (2006)

A.Petrovici, K.W.Schmid, O.Radu, A.Faessler

Variational approach to magnetic bands in 82Rb

NUCLEAR STRUCTURE 82Rb; calculated level energies, J, π, configurations, B(E2), B(M1), magnetic rotational bands, shape coexistence features.

doi: 10.1140/epja/i2005-10279-7
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2006PE30      Int.J.Mod.Phys. E15, 1477 (2006)

A.Petrovici

Exotic nuclear structure phenomena in medium mass nuclei

NUCLEAR STRUCTURE 70Se, 70Br, 70Kr; calculated 0+ level energies, β-decay strengths, isospin-mixing corrections. 82Rb; calculated levels, J, π, B(E2), B(M1). Excited Vampir model.

doi: 10.1142/S021830130600506X
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2005PE01      Nucl.Phys. A747, 44 (2005)

A.Petrovici, K.W.Schmid, O.Radu, A.Faessler

Variational calculation of the effect of isospin-mixing on superallowed Fermi β decay in the A ∼ 70 mass region

NUCLEAR STRUCTURE 70Se, 70Br, 70,74Kr, 74Rb, 74Sr; calculated 0+ level energies, configurations, superallowed β-decay strengths, isospin mixing effects.

doi: 10.1016/j.nuclphysa.2004.10.002
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2003PE30      Nucl.Phys. A728, 396 (2003)

A.Petrovici, K.W.Schmid, A.Faessler

Microscopic description of the mirror nuclei 70Se and 70Kr

NUCLEAR STRUCTURE 70Se, 70Kr; calculated levels, J, π, configurations, B(E2), B(M1), rotational bands, shape coexistence features.

doi: 10.1016/j.nuclphysa.2003.09.004
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2002PE12      Nucl.Phys. A704, 144c (2002)

A.Petrovici

Large Scale Nuclear Structure Calculations for Medium Mass N = Z Nuclei

NUCLEAR STRUCTURE 56Ni, 68Se, 72Kr; calculated levels, J, π, B(E2), shape coexistance features. Comparisons with data.

doi: 10.1016/S0375-9474(02)00775-3
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2002PE14      Nucl.Phys. A708, 190 (2002)

A.Petrovici, K.W.Schmid, A.Faessler

Shape Coexistence and Center-of-Mass Effects in N = Z Medium Mass Nuclei

NUCLEAR STRUCTURE 72Kr, 76Sr, 80Zr; calculated levels, J, π, configurations, B(E2), deformation, shape coexistence.

doi: 10.1016/S0375-9474(02)01032-1
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2002PE17      Nucl.Phys. A710, 246 (2002)

A.Petrovici, K.W.Schmid, A.Faessler

Variational approach to shape coexistence in 68Se

NUCLEAR STRUCTURE 68Se; calculated levels B(E2), quadrupole moments, shape coexistence features, neutron-proton correlations. Variational approach.

doi: 10.1016/S0375-9474(02)01089-8
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2001PE09      Nucl.Phys. A689, 707 (2001)

A.Petrovici, K.W.Schmid, A.Faessler

Variational Approach to Shape Coexistence in 56Ni

NUCLEAR STRUCTURE 56Ni; calculated levels, J, π, quadrupole moments, deformation, shape coexistence features. Variational approach.

doi: 10.1016/S0375-9474(00)00691-6
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2000PE06      Nucl.Phys. A665, 333 (2000)

A.Petrovici, K.W.Schmid, A.Faessler

Microscopic Aspects of Shape Coexistence in 72Kr and 74Kr

NUCLEAR STRUCTURE 72,74Kr; calculated levels J, π, decay branching ratios, oblate/prolate deformation mixing, B(E2), spectroscopic quadrupole moments, alignment, occupation, g-factors. Comparison with data, HFB, excited vampir calculations.

doi: 10.1016/S0375-9474(99)00811-8
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1999PE02      Nucl.Phys. A647, 197 (1999)

A.Petrovici, K.W.Schmid, A.Faessler

Neutron-Proton Pairing Correlations in Medium Mass N ≈ Z Nuclei

NUCLEAR STRUCTURE 66As, 64,66Ge, 74Rb, 72,74,76,78Kr; calculated nn, pp, np pairing gaps, other pairing-related features. 72Kr, 74Rb calculated levels, J, π, configurations; deduced role of isovector neutron-proton pairing. Complex Excited Vampir approach.

doi: 10.1016/S0375-9474(99)00004-4
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1999PE08      J.Phys.(London) G25, 803 (1999)

A.Petrovici

Large-Scale Nuclear Structure Studies of Medium-Mass Nuclei

NUCLEAR STRUCTURE 72,74,76,78Kr, 74Rb; calculated average np, like-nucleon pairing gaps for low-lying 0+ states. Excited Vampir approach.

doi: 10.1088/0954-3899/25/4/041
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1999PE17      Prog.Part.Nucl.Phys. 43, 485 (1999)

A.Petrovici, K.W.Schmid, A.Faessler, J.H.Hamilton, A.V.Ramayya

Shape Coexistence Phenomena in Medium Mass Nuclei

NUCLEAR STRUCTURE 74Kr, 74Rb, 76Sr, 80Zr, 84Mo; calculated levels, J, π. 68,72As, 72,74Kr, 78Rb, 78,82Sr; calculated high-spin levels, J, π, B(λ); deduced shape coexistence, pairing correlation features. Excited Vampir calculations, comparisons with data.

doi: 10.1016/S0146-6410(99)00099-X
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1998DO01      Phys.Rev. C57, 97 (1998)

J.Doring, D.Pantelica, A.Petrovici, B.R.S.Babu, J.H.Hamilton, J.Kormicki, Q.H.Lu, A.V.Ramayya, O.J.Tekyi-Mensah, S.L.Tabor

Evidence for Yrast Positive-Parity High-Spin States in Odd-Odd 72As

NUCLEAR REACTIONS 62Ni(13C, 2np), E=48.5 MeV; measured Eγ, Iγ, γ(θ), γ linear polarization. 72As deduced high-spin levels, J, π, B(E2), δ. VAMPIR calculations.

doi: 10.1103/PhysRevC.57.97
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1998YU01      Phys.Rev. C57, 113 (1998)

C.-H.Yu, C.Baktash, M.J.Brinkman, H.-Q.Jin, D.Rudolph, C.J.Gross, M.Devlin, D.R.LaFosse, F.Lerma, D.G.Sarantites, G.N.Sylvan, S.L.Tabor, I.Birriel, J.X.Saladin, D.F.Winchell, V.Q.Wood, R.M.Clark, P.Fallon, I.Y.Lee, A.O.Macchiavelli, J.C.Wells, A.Petrovici, K.W.Schmid, A.Faessler

Lifetime Measurements of Normally Deformed and Superdeformed States in 82Sr

NUCLEAR REACTIONS 58Ni(28Si, 4p), E=130 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-coin, DSA. 82Sr deduced high-spin levels, J, π, T1/2, superdeformed bands transition quadrupole moments, configurations. Shell model calculations.

doi: 10.1103/PhysRevC.57.113
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1997CH46      Phys.Rev. C56, R2924 (1997)

C.Chandler, P.H.Regan, C.J.Pearson, B.Blank, A.M.Bruce, W.N.Catford, N.Curtis, S.Czajkowski, W.Gelletly, R.Grzywacz, Z.Janas, M.Lewitowicz, C.Marchand, N.A.Orr, R.D.Page, A.Petrovici, A.T.Reed, M.G.Saint-Laurent, S.M.Vincent, R.Wadsworth, D.D.Warner, J.S.Winfield

Evidence for a Highly Deformed Oblate 0+ State in 3674Kr

NUCLEAR REACTIONS Ni(92Mo, X), E=60 MeV/nucleon; measured Eγ, Iγ, (fragment)γ(t). 74Kr deduced isomeric state T1/2, J, π, deformation, oblate-prolate mixing.

doi: 10.1103/PhysRevC.56.R2924
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1997PE18      Z.Phys. A359, 19 (1997)

A.Petrovici, K.W.Schmid, A.Faessler

Microscopic Aspects of Identical Bands in 78Sr and 78Rb

NUCLEAR STRUCTURE 78Rb, 78Sr; calculated levels, quadrupole moments, B(E2), identical band related features. Complex Hartree-Fock-Bogoliubov transformations.

doi: 10.1007/s002180050361
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1996CH34      Int.J.Mod.Phys. E5, 565 (1996)

L.Chaturvedi, B.R.S.Babu, J.H.Hamilton, A.V.Ramayya, W.C.Ma, S.J.Zhu, J.Kormicki, A.Petrovici, K.W.Schmid, A.Faessler, N.R.Johnson, I.Y.Lee, C.Baktash, F.K.McGowan, M.L.Halbert, M.Riley, J.D.Cole

Negative Parity States in 68Ge: Experiment and theory

NUCLEAR REACTIONS 46Ti(25Mg, n2p), E=68 MeV; measured γγ-coin. 68Ge deduced high-spin levels, γ-multipolarity, band structure.

doi: 10.1142/S021830139600030X
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1996PA17      J.Phys.(London) G22, 1013 (1996)

D.Pantelica, A.Pantelica, F.Negoita, A.V.Ramayya, J.H.Hamilton, L.Chaturvedi, J.Kormicki, B.R.S.Babu, A.Petrovici, K.W.Schmid, A.Faessler, N.R.Johnson, I.Y.Lee, C.Baktash, F.K.McGowan, J.D.Cole, E.F.Zganjar, T.M.Cormier

Structure of Odd-Odd 72As: Experiment and theory

NUCLEAR REACTIONS 59Co(16O, n2p), E=52 MeV; 56Fe(19F, n2p), E=60 MeV; 47Ti(28Si, 3p), E=95 MeV; measured γγ-, (particle)γγ-coin, γγ(t), Eγ, Iγ, γ(θ). 72As deduced levels, J, π, B(λ), γ multipolarity. Model comparison.

doi: 10.1088/0954-3899/22/7/007
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1996PE04      Phys.Rev. C53, 2134 (1996)

A.Petrovici, K.W.Schmid, A.Faessler, D.Pantelica, F.Negoita, B.R.S.Babu, A.V.Ramayya, J.H.Hamilton, J.Kormicki, L.Chaturvedi, W.C.Ma, S.J.Zhu, N.R.Johnson, I.Y.Lee, C.Baktash, F.K.McGowan, M.L.Halbert, M.Riley, J.D.Cole

High Spin States in 68As: Experiment and theory

NUCLEAR REACTIONS 56Fe(14N, 2n), E=46 MeV; 58Ni(12C, np), E=36, 45 MeV; 46Ti(25Mg, 2np), E=68 MeV; measured γγ-coin. 68As deduced high-spin levels, J, π. Model comparison.

doi: 10.1103/PhysRevC.53.2134
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1996PE16      Nucl.Phys. A605, 290 (1996)

A.Petrovici, K.W.Schmid, A.Faessler

Shape Coexistence and Shape Transition in N ≈ Z Nuclei from Krypton to Molybdenum

NUCLEAR STRUCTURE 72Kr, 76,78Sr, 80Zr, 84Mo; calculated levels, spectroscopic quadrupole moments, B(λ); deduced shape features. Complex HFB transformations, large model space.

doi: 10.1016/0375-9474(96)00224-2
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1994PE04      Nucl.Phys. A571, 77 (1994)

A.Petrovici, K.W.Schmid, A.Faessler

Neutron-Proton Interaction and Structure of Bands in 72As

NUCLEAR STRUCTURE 68Ge, 72As; calculated levels, B(λ). HFB with symmetry projection.

doi: 10.1016/0375-9474(94)90342-5
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1993PE14      Z.Phys. A347, 15 (1993)

A.Petrovici, K.W.Schmid, A.Faessler

Structure of Negative-Parity States in 68Ge

NUCLEAR STRUCTURE 68Ge; calculated levels, negative parity band spectroscopic quadrupole moments. General symmetry-projected HFB quasiparticle determinants as trial configurations.

doi: 10.1007/BF01301271
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1993PE18      Z.Phys. A347, 87 (1993)

A.Petrovici, K.W.Schmid, A.Faessler

Nucleon Pair Structure of Realistic Many Body Wave Functions

NUCLEAR STRUCTURE 20Ne; calculated ground band two-body density scalar part. 68Ge; calculated yrast state two-body density scalar part; deduced nucleon pair structure. HFB approach, symmetry projection before variation.

doi: 10.1007/BF01284674
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1992PE11      Nucl.Phys. A549, 352 (1992)

A.Petrovici, E.Hammaren, K.W.Schmid, F.Grummer, A.Faessler

Shape Coexistence in the A ≈ 70 Region Including Neutron-Proton Interaction and Unnatural-Parity Correlations in the Mean Field

NUCLEAR STRUCTURE 72Ge, 72Kr; calculated levels. 68Ge; calculated levels, B(λ), spectroscopic quadrupole moments. Neutron-proton interaction, unnatural parity correlations, mean field approach.

doi: 10.1016/0375-9474(92)90084-W
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1992PE17      Fiz.Elem.Chastits At.Yadra 23, 914 (1992); Sov.J.Part.Nucl. 23, 402 (1992)

A.Petrovici, K.W.Schmid, A.Faessler

Microscopic Description of the Shape Coexistence in the A ≈ 70 Mass Region

NUCLEAR STRUCTURE 68,70,72,74Ge, 70,72Se, 70,74,76Kr; calculated levels, B(λ), quadrupole moments in some cases; deduced shape coexistence phenomena related features. Symmetry projected HFB calculation.


1991CH14      Phys.Rev. C43, 2541 (1991)

L.Chaturvedi, X.Zhao, A.V.Ramayya, J.H.Hamilton, J.Kormicki, S.Zhu, C.Girit, H.Xie, W.-B.Gao, Y.-R.Jiang, A.Petrovici, K.W.Schmid, A.Faessler, N.R.Johnson, C.Baktash, I.Y.Lee, F.K.McGowan, M.L.Halbert, M.A.Riley, J.H.McNeill, M.O.Kortelahti, J.D.Cole, R.B.Piercey, H.Q.Jin

Tests of Microscopic Calculations of Multiple Band Structures and Large Deformations in 68Ge and 72Se

NUCLEAR REACTIONS 46Ti(25Mg, n2p), E=68 MeV; 47Ti(28Si, X), E=95 MeV; measured γγ-coin. 68Ge, 72Se deduced levels, J, π, band structure, deformation features.

doi: 10.1103/PhysRevC.43.2541
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1991PE09      Z.Phys. A339, 71 (1991)

A.Petrovici, K.W.Schmid, F.Grummer, A.Faessler

Calculation of Charge and Transition Charge Densities in Some Even Mass Ge Isotopes from Microscopic Nuclear Structure Wave Functions

NUCLEAR STRUCTURE 68,70,72,74,76Ge; calculated transition charge density. Microscopic model.

doi: 10.1007/BF01282935
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1990PE12      Nucl.Phys. A517, 108 (1990)

A.Petrovici, K.W.Schmid, F.Grummer, A.Faessler

Some New Aspects of the Shape Coexistence in the A = 70 Mass Region

NUCLEAR STRUCTURE 68Ge, 70Se; calculated levels; deduced shape coexistence features. Symmetry projected quasiparticle mean-field solutions.

doi: 10.1016/0375-9474(90)90263-L
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1989PE13      Nucl.Phys. A504, 277 (1989)

A.Petrovici, K.W.Schmid, F.Grummer, A.Faessler

Shape Coexistence at High Spins in the Nuclei 68Ge and 72Se

NUCLEAR STRUCTURE 68Ge, 72Se; calculated levels, quadrupole moments, B(λ), g-factor, hexadecapole moments. Self-consistent, symmetry projected HFB.

doi: 10.1016/0375-9474(89)90346-1
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1988CR04      Z.Phys. A331, 287 (1988)

M.I.Cristu, S.Holan, A.Faessler, A.Petrovici

Competition between β+- and β--Decays from the Transitional Nucleus 74As

RADIOACTIVITY 74As(β+), (β-); calculated β-spectra, log ft. 74Se, 74Ge deduced 0+ state structure.


1988PE10      Nucl.Phys. A483, 317 (1988)

A.Petrovici, K.W.Schmid, F.Grummer, A.Faessler, T.Horibata

Microscopic Description of Low-Lying States in Even Ge and Se Nuclei

NUCLEAR STRUCTURE 68,70,72,74Ge, 72,74Se; calculated levels, occupational probabilities, B(λ), pairing gaps, intrinsic quadrupole, hexadecapole moments. HFB method.

doi: 10.1016/0375-9474(88)90539-8
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1985BO08      Phys.Lett. 150B, 29 (1985)

D.Bogdan, A.Faessler, A.Petrovici, S.Holan

Neutrino Masses and Right-Handed Current in the Neutrinoless Double Beta Decay 76Ge → 76Se + 2e-

RADIOACTIVITY 76Ge(2β); calculated decay matrix elements; deduced neutrino mass upper limit.

doi: 10.1016/0370-2693(85)90131-5
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1985FA03      Nucl.Phys. A438, 78 (1985)

A.Faessler, S.Kuyucak, A.Petrovici, L.Petersen

Rotor and IBA Description of Proton and Neutron Alignment in the Ba and Ce Isotopes

NUCLEAR STRUCTURE 126,128,130Ba, 130,132,134Ce; calculated levels, occupation probabilities, quasiparticle energies. Quasiparticle-core coupling, triaxial rotor, IBA models.

doi: 10.1016/0375-9474(85)90119-8
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1983BA46      Rev.Roum.Phys. 28, 25 (1983)

T.Badica, C.Ciortea, S.Dima, A.Petrovici, I.Popescu

Reaction Chamber for Magnetic Moment Measurements by the Recoil-Into-Gas Method

NUCLEAR REACTIONS 148Nd(16O, 16O'), E=36 MeV; measured Coulomb excitation, γ(θ, H). Recoil into Helium technique, pressure variation, enriched target.


1983BA69      Z.Phys. A314, 55 (1983)

T.Badica, C.Ciortea, D.Pantelica, A.Petrovici, I.Popescu

Magnetic Moment Measurements in 64Zn and 66Zn

NUCLEAR REACTIONS 51V(16O, 2np), E=51 MeV; 55Mn(14N, n2p), E=54 MeV; measured γγ(θ, H), recoil into He, Eγ, Iγ, γ(θ). 64Zn, 66Zn levels deduced g, γ-branching.


1983BA73      Hyperfine Interactions 15/16, 63 (1983)

T.Badica, A.Petrovici, I.Popescu

Magnetic Moment Measurements in 67Ga

NUCLEAR REACTIONS 57Fe(12C, np), E=40 MeV; measured γγ(θ, H). 67Ga levels deduced g ratio.

doi: 10.1007/BF02159716
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1983PE01      Nucl.Phys. A395, 44 (1983)

A.Petrovici, A.Faessler

Two-Quasiparticle Admixtures and the Asymmetric Rotor Model in Ge and Zn Isotopes

NUCLEAR STRUCTURE 66,68,70Ge, 64,66Zn; calculated levels, B(λ). Asymmetric rotor model, two-quasiparticle admixtures.

doi: 10.1016/0375-9474(83)90088-X
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1983PE20      Z.Phys. A314, 227 (1983)

A.Petrovici, A.Faessler, Th.Koppel

Microscopic Calculation of the Collective Motion in 76Kr

NUCLEAR STRUCTURE 76Kr; calculated liquid drop energy, potential functions, deformation energy, mass parameter, moment of inertia, average effective mass, ground state wave function, collective states g, spectroscopic quadrupole moments, B(E2). Bohr Hamiltonian, microscopic calculation.

doi: 10.1007/BF01879882
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1982BA42      J.Phys.(London) G8, 1397 (1982)

T.Badica, C.Ciortea, A.Petrovici, I.Popescu

Gyromagnetic Factors of Negative-Parity States in 68Ge

NUCLEAR REACTIONS 58Ni(12C, 2p), E=40 MeV; measured Eγ, Iγ, γγ(θ, H). 68Ge levels deduced g. Recoil into gas technique.

doi: 10.1088/0305-4616/8/10/010
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1982BA66      Rev.Roum.Phys. 27, 737 (1982)

T.Badica, C.Ciortea, A.Enulescu, A.Petrovici, I.Piticu, I.Popescu

Foil Thickness Dependence of Ni Kα-X-Ray Production for 1.5 MeV/amu Sulphur Ions

ATOMIC PHYSICS Ni(32S, X), E=1.5 MeV/nucleon; measured K X-ray yields; deduced foil thickness dependence.


1981BA30      ATOMKI Kozlem. 23, 21 (1981)

T.Badica, C.Ciortea, A.Petrovici, I.Popescu

K-X-Ray Production Cross Sections by 1-2.5 MeV/amu 32S Ions

NUCLEAR REACTIONS Ag, Sn, Te(32S, X), E=32, 48, 64, 80 MeV; measured production σ for (K X-ray) vs E. Plane wave Born, binary counter approximations. Thin solid targets.


1979BA40      Nucl.Phys. A331, 75 (1979)

T.Badica, C.Ciortea, A.Petrovici, I.Popescu

Low-Lying Energy Levels in 166Ho

RADIOACTIVITY 166Dy [from 164Dy(n, γ)165Dy(n, γ)166Dy]; measured Iγ, γγ(θ), γγ(θ, H), 166Ho level deduced μ. Enriched target, Ge(Li), Ge detectors.

doi: 10.1016/0375-9474(79)90302-6
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1978AN30      Hyperfine Interactions 4, 190 (1978)

A.Anghelescu, V.Avrigeanu, E.Bodo, C.Ciortea, B.Constantinescu, I.David, P.Osiceanu, D.Pantelica, A.Petrovici, M.Petrovici, S.Vajda, M.Zaharcu

Recoil Into Vacuum g Factor Measurement of the 5/2+ State at 0.350 MeV in 21Ne

NUCLEAR REACTIONS 7Li(16O, d), E=22, 35 MeV; measured Doppler-shifted Eγ, Iγ(θ). 21Ne deduced level T1/2, g factor. Recoil-distance technique.

doi: 10.1007/BF01021822
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1978BA03      Z.Phys. A284, 161 (1978)

T.Badica, C.Ciortea, S.Dima, A.Petrovici, I.Popescu

Properties of the 635.4 keV Level in 171Tm

RADIOACTIVITY 171Er; measured γγ(θ, H). 171Tm levels deduced J, π, g.


1977AN26      Rev.Roum.Phys. 22, 859 (1977)

A.Anghelescu, V.Avrigeanu, E.Bodo, C.Ciortea, B.Constantinescu, I.David, P.Osiceanu, O.Pantelica, A.Petrovici, M.Petrovici, S.Vajda, M.Zaharcu

Hyperfine Interactions in Highly Ionized 21Ne Atoms and the Magnetic Moment of the 5/2+ State at 0.350 MeV

NUCLEAR REACTIONS 7Li(16O, d), E=22, 35 MeV; measured recoil distance, γ(θ). 21Ne level deduced T1/2, g.


1977BA63      Hyperfine Interactions 3, 423 (1977)

T.Badica, D.Bogdan, C.Ciortea, S.Dima, A.Petrovici

Magnetic Moment Measurement of the 129.2 keV Level in 153Gd

RADIOACTIVITY 153Tb; measured integral γγ(θ, H). 153Gd level deduced μ.


1976BA26      Z.Phys. A277, 217 (1976)

T.Badica, D.Bogdan, C.Ciortea, S.Dima, A.Petrovici, I.Popescu, I.I.Gromova

Magnetic Moment Measurement of 108 keV Level in 151Gd

RADIOACTIVITY 151Tb; measured γγ(θ, H, t). 151Gd level deduced μ.


1976BA44      Rev.Roum.Phys. 21, 1059 (1976)

T.Badica, C.Ciortea, S.Dima, A.Petrovici, I.Popescu

Gamma-Gamma Angular Correlations in 151Sm

RADIOACTIVITY 151Pm; measured γγ(θ). 151Sm levels deduced J.


1974BA24      Nucl.Phys. A222, 168 (1974)

T.Badica, C.Ciortea, S.Dima, A.Gelberg, A.Petrovici, I.Popescu

The Magnetic Moment of the 828 keV Level in 115In

RADIOACTIVITY 115Cd [from 114Cd(nγ)]; measured γγ(θ, b). 115In level deduced μ. Enriched target, Si(Li), Ge(Li) detectors.

doi: 10.1016/0375-9474(74)90591-0
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