Yrast structures of 98Nb and 99Mo

Fotiades, N.; Cizewski, J. A.; Fallon, P.; Kevrekidis, P. G.; Krücken, R.; Lee, I. Y.

doi:10.1103/physrevc.111.014316

Title: Yrast structures of ⁹⁸Nb and ⁹⁹Mo

Journal Article · 13 January 2025 · Physical Review. C

DOI: https://doi.org/10.1103/physrevc.111.014316 · OSTI ID:2500893

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Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Rutgers Univ., New Brunswick, NJ (United States)
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Univ. of Massachusetts, Amherst, MA (United States)

Neutron-rich nuclei in the A ≈ 100 mass region are interesting due to a rapid shape transition, especially pronounced in the Zr isotopes, and more recently observed in Nb isotopes. ⁹⁸Nb, with only one proton and one neutron outside the subshell closure nucleus of ⁹⁶Zr, is amenable to shell model calculations. To further examine the rapid shape transition the yrast structure of ⁹⁸Nb was established in this work. This was the only yrast structure missing from all immediate neighbors to ⁹⁶Zr. The yrast structure of ⁹⁸Nb was studied in the fission of the compound systems formed in three heavy-ion induced reactions, ²⁴Mg (134.5 MeV) + ¹⁷³Yb, ²³Na (129 MeV) + ¹⁷⁶Yb, and ¹⁸O (91 MeV) + ²⁰⁸Pb. Prompt γ-ray spectroscopy was accomplished using the Gammasphere array. Excitation energies up to 3 MeV were observed for the first time in ⁹⁸Nb. The yrast structure above the previously known (5)⁺ isomer was established. In the process of studying ⁹⁸Nb the yrast structure of positive-parity states in ⁹⁹Mo was extended to 3.7 MeV excitation energy, the previously-known ⁹⁹Nb level scheme was enriched, and two new levels were added in the level scheme of ⁹⁷Zr. The coupling of the odd proton occupying the g_9/2 orbital to the yrast states in the core nucleus of ⁹⁷Zr can account for all observed states in ⁹⁸Nb. The yrast structure for the positive-parity states of ⁹⁹Mo is compared to the deformed ground-state bands of the ¹⁰¹Ru isotone and of ^98,100Mo.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: National Science Foundation (NSF); US Department of Energy; USDOE; USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)

Grant/Contract Number:: 89233218CNA000001; AC02-05CH11231

OSTI ID:: 2500893

Report Number(s):: LA-UR--24-25870

Journal Information:: Physical Review. C, Journal Name: Physical Review. C Journal Issue: 1 Vol. 111; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

References (58)

Nuclea Data Sheets for A = 101 Blachot, Jean Nuclear Data Sheets, Vol. 83, Issue 1 https://doi.org/10.1006/ndsh.1998.0001	journal	January 1998
The deformation of103Nb Liang, M.; Ohm, H.; De Sutter, B. Zeitschrift für Physik A Hadrons and Nuclei, Vol. 344, Issue 3 https://doi.org/10.1007/BF01303035	journal	September 1992
Molybdenum-99 production pathways and the sorbents for 99Mo/99mTc generator systems using (n, γ) 99Mo: a review Hasan, Shameem; Prelas, Mark A. SN Applied Sciences, Vol. 2, Issue 11 https://doi.org/10.1007/s42452-020-03524-1	journal	October 2020
Background subtraction from in-beam HPGe coincidence data sets Radford, D. C. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 361, Issue 1-2 https://doi.org/10.1016/0168-9002(95)00184-0	journal	July 1995
Proton-neutron interaction in 98Nb with the (τ,p) reaction Medsker, L. R.; Fortune, H. T. Physics Letters B, Vol. 58, Issue 3 https://doi.org/10.1016/0370-2693(75)90657-7	journal	September 1975
The GAMMASPHERE Lee, I-Yang Nuclear Physics A, Vol. 520 https://doi.org/10.1016/0375-9474(90)91181-P	journal	December 1990
Rotational bands in the mass 100 region Hotchkis, M. A. C.; Durell, J. L.; Fitzgerald, J. B. Nuclear Physics A, Vol. 530, Issue 1 https://doi.org/10.1016/0375-9474(91)90758-X	journal	July 1991
In-beam spectroscopic studies of the nucleus 105Cd Jerrestam, D.; Fogelberg, B.; Kerek, A. Nuclear Physics A, Vol. 593, Issue 2 https://doi.org/10.1016/0375-9474(95)00334-W	journal	October 1995
Nuclear Data Sheets for A = 94 Abriola, D.; Sonzogni, A. A. Nuclear Data Sheets, Vol. 107, Issue 9 https://doi.org/10.1016/j.nds.2006.08.001	journal	September 2006
Nuclear Data Sheets for A = 104 Blachot, Jean Nuclear Data Sheets, Vol. 108, Issue 10 https://doi.org/10.1016/j.nds.2007.09.001	journal	October 2007
Nuclear Data Sheets for A = 106 De Frenne, D.; Negret, A. Nuclear Data Sheets, Vol. 109, Issue 4 https://doi.org/10.1016/j.nds.2008.03.002	journal	April 2008
Nuclear Data Sheets for A = 107 Blachot, Jean Nuclear Data Sheets, Vol. 109, Issue 6 https://doi.org/10.1016/j.nds.2008.05.001	journal	June 2008
Nuclear Data Sheets for A = 96 Abriola, D.; Sonzogni, A. A. Nuclear Data Sheets, Vol. 109, Issue 11 https://doi.org/10.1016/j.nds.2008.10.002	journal	November 2008
Nuclear Data Sheets for A = 102 De Frenne, D. Nuclear Data Sheets, Vol. 110, Issue 8 https://doi.org/10.1016/j.nds.2009.06.002	journal	August 2009
Nuclear Data Sheets for A = 103 De Frenne, D. Nuclear Data Sheets, Vol. 110, Issue 9 https://doi.org/10.1016/j.nds.2009.08.002	journal	September 2009
Nuclear Data Sheets for A = 97 Nica, N. Nuclear Data Sheets, Vol. 111, Issue 3 https://doi.org/10.1016/j.nds.2010.03.001	journal	March 2010
Nuclear Data Sheets for A = 95 Basu, S. K.; Mukherjee, G.; Sonzogni, A. A. Nuclear Data Sheets, Vol. 111, Issue 10-11 https://doi.org/10.1016/j.nds.2010.10.001	journal	October 2010
Nuclear Data Sheets for A = 93 Baglin, Coral M. Nuclear Data Sheets, Vol. 112, Issue 5 https://doi.org/10.1016/j.nds.2011.04.001	journal	May 2011
Nuclear Data Sheets for A = 99 Browne, E.; Tuli, J. K. Nuclear Data Sheets, Vol. 145 https://doi.org/10.1016/j.nds.2017.09.002	journal	November 2017
Nuclear Data Sheets for A=105 Lalkovski, S.; Timar, J.; Elekes, Z. Nuclear Data Sheets, Vol. 161-162 https://doi.org/10.1016/j.nds.2019.11.001	journal	November 2019
Nuclear Data Sheets for A=98 Chen, Jun; Singh, Balraj Nuclear Data Sheets, Vol. 164 https://doi.org/10.1016/j.nds.2020.01.001	journal	February 2020
Nuclear Data Sheets for A=100 Singh, Balraj; Chen, Jun Nuclear Data Sheets, Vol. 172 https://doi.org/10.1016/j.nds.2021.02.001	journal	February 2021
New Physics Opportunities at Gammasphere Janssens, Robert; Stephens, Frank Nuclear Physics News, Vol. 6, Issue 4 https://doi.org/10.1080/10506899609411095	journal	January 1996
Shape trends and triaxiality in neutron-rich odd-mass Y and Nb isotopes Luo, Y. X.; Rasmussen, J. O.; Stefanescu, I. Journal of Physics G: Nuclear and Particle Physics, Vol. 31, Issue 11 https://doi.org/10.1088/0954-3899/31/11/013	journal	September 2005
Medium and high spin structure in the⁹⁴Y isotope produced in fission induced by cold neutrons Iskra, Ł W.; Fornal, B.; Leoni, S. Physica Scripta, Vol. 92, Issue 10 https://doi.org/10.1088/1402-4896/aa842a	journal	September 2017
γ spectroscopy of the Y96 isotope: Searching for the onset of shape coexistence before N=60 Iskra, Ł. W.; Leoni, S.; Fornal, B. Physical Review C, Vol. 102, Issue 5 https://doi.org/10.1103/PhysRevC.102.054324	journal	November 2020
Structure of N=56 isotones with 36≤Z≤42 protons Wiśniewski, J.; Urban, W.; Rząca-Urban, T. Physical Review C, Vol. 108, Issue 2 https://doi.org/10.1103/PhysRevC.108.024302	journal	August 2023
Evolution of nuclear structure in the neutron-rich Nb96,97,99 isotopes: Evidence for shape coexistence in N=58Nb99 Kumar, V.; Chapman, R.; O'Donnell, D. Physical Review C, Vol. 108, Issue 4 https://doi.org/10.1103/PhysRevC.108.044313	journal	October 2023
Nuclear structure of Sr, Zr, and Mo isotopes Kumar, Ashok; Gunye, M. R. Physical Review C, Vol. 32, Issue 6 https://doi.org/10.1103/PhysRevC.32.2116	journal	December 1985
Medium-spin states inMo99 Dubuc, J.; Kajrys, G.; Larivière, P. Physical Review C, Vol. 37, Issue 3 https://doi.org/10.1103/PhysRevC.37.954	journal	March 1988
Decays of theY97isomers to the single neutron nucleusZr97 Lhersonneau, G.; Dendooven, P.; Hankonen, S. Physical Review C, Vol. 54, Issue 3 https://doi.org/10.1103/PhysRevC.54.1117	journal	September 1996
Identification of μs isomers in the fission products of 241 Pu ( n th , f ) Genevey, J.; Ibrahim, F.; Pinston, J. A. Physical Review C, Vol. 59, Issue 1 https://doi.org/10.1103/PhysRevC.59.82	journal	January 1999
Level structure of 100 Nb Lhersonneau, G.; Brant, S.; Paar, V. Physical Review C, Vol. 62, Issue 4 https://doi.org/10.1103/PhysRevC.62.044304	journal	September 2000
High-spin excitations in 9 2 , 9 3 , 9 4 , 9 5 Zr Fotiades, N.; Cizewski, J. A.; Becker, J. A. Physical Review C, Vol. 65, Issue 4 https://doi.org/10.1103/PhysRevC.65.044303	journal	March 2002
High-spin states in 1 0 3 , 1 0 5 Mo , 103 Nb , and the ν h 1 1 / 2 alignment Hua, H.; Wu, C. Y.; Cline, D. Physical Review C, Vol. 65, Issue 6 https://doi.org/10.1103/PhysRevC.65.064325	journal	June 2002
High-jproton and neutron alignments in γ-soft101Ru Yamamoto, A. D.; Regan, P. H.; Beausang, C. W. Physical Review C, Vol. 66, Issue 2 https://doi.org/10.1103/PhysRevC.66.024302	journal	August 2002
High-spin states in odd-odd 1 0 6 , 1 0 8 , 1 1 0 , 1 1 2 Rh Fotiades, N.; Cizewski, J. A.; Krücken, R. Physical Review C, Vol. 67, Issue 6 https://doi.org/10.1103/PhysRevC.67.064304	journal	June 2003
Binary-reaction spectroscopy of Mo 99 , 100 : Intruder alignment systematics in N = 57 and N = 58 isotones Regan, P. H.; Yamamoto, A. D.; Xu, F. R. Physical Review C, Vol. 68, Issue 4 https://doi.org/10.1103/PhysRevC.68.044313	journal	October 2003
Neutron Shell Structure inZr93,Zr95, andZr97by (d, p) and (α,He3) Reactions Bingham, C. R.; Fabian, G. T. Physical Review C, Vol. 7, Issue 4 https://doi.org/10.1103/PhysRevC.7.1509	journal	April 1973
High-spin states in Zr 92 − 96 nuclei Pantelica, D.; Stefan, I. Gh.; Nica, N. Physical Review C, Vol. 72, Issue 2 https://doi.org/10.1103/PhysRevC.72.024304	journal	August 2005
Octupole collectivity in Mo 98 , 100 , 102 Lalkovski, S.; Ilieva, S.; Minkova, A. Physical Review C, Vol. 75, Issue 1 https://doi.org/10.1103/PhysRevC.75.014314	journal	January 2007
Short-lived isomers in Rb 94 Tsekhanovich, I.; Simpson, G. S.; Urban, W. Physical Review C, Vol. 78, Issue 1 https://doi.org/10.1103/PhysRevC.78.011301	journal	July 2008
New isomers and medium-spin structure of the Y 95 nucleus Urban, W.; Sieja, K.; Simpson, G. S. Physical Review C, Vol. 79, Issue 4 https://doi.org/10.1103/PhysRevC.79.044304	journal	April 2009
Structure of dipole bands inIn106 Deo, A. Y.; Palit, R.; Naik, Z. Physical Review C, Vol. 79, Issue 6 https://doi.org/10.1103/PhysRevC.79.067304	journal	June 2009
Yrast structure ofZr97andβdecay of the27/2−high-spin isomer inY97 Matejska-Minda, M.; Fornal, B.; Broda, R. Physical Review C, Vol. 80, Issue 1 https://doi.org/10.1103/PhysRevC.80.017302	journal	July 2009
High-spin states in Nb 96 , 97 Fotiades, N.; Cizewski, J. A.; Krücken, R. Physical Review C, Vol. 82, Issue 4 https://doi.org/10.1103/PhysRevC.82.044306	journal	October 2010
States built on the 10 + isomers in 118 , 120 , 122 , 124 Sn Fotiades, N.; Devlin, M.; Nelson, R. O. Physical Review C, Vol. 84, Issue 5 https://doi.org/10.1103/PhysRevC.84.054310	journal	November 2011
Triple shape coexistence and shape evolution in the N = 58 Sr and Zr isotopes Petrovici, A. Physical Review C, Vol. 85, Issue 3 https://doi.org/10.1103/PhysRevC.85.034337	journal	March 2012
High-spin level structure of the doubly odd nucleus104Ag Wang, Z. G.; Liu, M. L.; Zhang, Y. H. Physical Review C, Vol. 88, Issue 2 https://doi.org/10.1103/PhysRevC.88.024306	journal	August 2013
Experimental study of the rearrangements of valence protons and neutrons amongst single-particle orbits during double- β decay in Mo 100 Freeman, S. J.; Sharp, D. K.; McAllister, S. A. Physical Review C, Vol. 96, Issue 5 https://doi.org/10.1103/PhysRevC.96.054325	journal	November 2017
Low-spin excitations in Zr 97 Rząca-Urban, T.; Urban, W.; Czerwiński, M. Physical Review C, Vol. 98, Issue 6 https://doi.org/10.1103/PhysRevC.98.064315	journal	December 2018
Laser Spectroscopy of Niobium Fission Fragments: First Use of Optical Pumping in an Ion Beam Cooler Buncher Cheal, B.; Baczynska, K.; Billowes, J. Physical Review Letters, Vol. 102, Issue 22 https://doi.org/10.1103/PhysRevLett.102.222501	journal	June 2009
Candidates for Twin Chiral Bands in Rh 102 Tonev, D.; Yavahchova, M. S.; Goutev, N. Physical Review Letters, Vol. 112, Issue 5 https://doi.org/10.1103/PhysRevLett.112.052501	journal	February 2014
Experimental Information Concerning Deformation of Neutron Rich Nuclei in the A ∼ 100 Region Cheifetz, E.; Jared, R. C.; Thompson, S. G. Physical Review Letters, Vol. 25, Issue 1 https://doi.org/10.1103/PhysRevLett.25.38	journal	July 1970
Quantum phase transitions in the shapes of atomic nuclei Cejnar, Pavel; Jolie, Jan; Casten, Richard F. Reviews of Modern Physics, Vol. 82, Issue 3 https://doi.org/10.1103/RevModPhys.82.2155	journal	August 2010
Shape coexistence in atomic nuclei Heyde, Kris; Wood, John L. Reviews of Modern Physics, Vol. 83, Issue 4 https://doi.org/10.1103/RevModPhys.83.1467	journal	November 2011
Coulomb excitation of the odd-odd isotopes 106, 108In Ekström, A.; Cederkäll, J.; Fahlander, C. The European Physical Journal A, Vol. 44, Issue 3 https://doi.org/10.1140/epja/i2010-10945-7	journal	April 2010
Shell evolution of stable N = 50-56 Zr and Mo nuclei with respect to low-lying octupole excitations Gregor, E. T.; Scheck, M.; Chapman, R. The European Physical Journal A, Vol. 53, Issue 3 https://doi.org/10.1140/epja/i2017-12224-7	journal	March 2017

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