New insights into triaxiality and shape coexistence from odd-mass Rh109

Bucher, Brian; Mach, H.; Aprahamian, A.; Robledo, L. M.; Simpson, G. S.; Rissanen, J.; Ghiţă, D. G.; Olaizola, B.; Kurcewicz, W.; Äystö, J.; Eronen, T.; Fraile, L. M.; Jokinen, A.; Karvonen, P.; Moore, I. D.; Penttilä, H.; Reponen, M.; Ruchowska, E.; Saastamoinen, A.; Smith, M. K.; Weber, C.

doi:10.1103/physrevc.98.064320

New insights into triaxiality and shape coexistence from odd-mass Rh 109

Journal Article · Thu Dec 20 00:00:00 EST 2018 · Physical Review. C

DOI:https://doi.org/10.1103/physrevc.98.064320· OSTI ID:1891494

^[1]; Mach, H. ^[2]; Aprahamian, A. ^[3]; Robledo, L. M. ^[4]; Simpson, G. S. ^[5]; Rissanen, J. ^[6]; Ghiţă, D. G. ^[7]; Olaizola, B. ^[8]; Kurcewicz, W. ^[9]; Äystö, J. ^[10]; Eronen, T. ^[10]; Fraile, L. M. ^[11]; Jokinen, A. ^[10]; Karvonen, P. ^[12]; Moore, I. D. ^[10]; Penttilä, H. ^[10]; Reponen, M. ^[10]; Ruchowska, E. ^[13]; Saastamoinen, A. ^[14]; Smith, M. K. ^[15] more »

Idaho National Lab. (INL), Idaho Falls, ID (United States); Univ. of Notre Dame, IN (United States)
Univ. of Notre Dame, IN (United States); National Centre for Nuclear Research, Warsaw (Poland)
Univ. of Notre Dame, IN (United States)
Univ. Autónoma de Madrid (Spain)
Univ. Grenoble Alpes (France)
Univ. of Jyväskylä (Finland); Fennovoima Oy, Helinski (Finland)
National Institute for Physics and Nuclear Engineering, Bucharest-Magurele (Romania)
Univ. Complutense de Madrid (Spain); TRIUMF, Vancouver, BC (Canada)
Univ. of Warsaw (Poland)
Univ. of Jyväskylä (Finland)
Univ. Complutense de Madrid (Spain)
Univ. of Jyväskylä (Finland); Fortum Power Division (Finland)
National Centre for Nuclear Research, Warsaw (Poland)
Univ. of Jyväskylä (Finland); Texas A & M Univ., College Station, TX (United States)
Univ. of Notre Dame, IN (United States); Michigan State Univ., East Lansing, MI (United States)
Univ. of Jyväskylä (Finland); Ludwig-Maximilians Univ. Munich, Garching (Germany)

Rapid shape evolutions near A = 100 are now the focus of much attention in nuclear science. Much of the recent work has been centered on isotopes with Z ≤ 40, where the shapes are observed to transition between near-spherical to highly deformed with only a single pair of neutrons added. At higher Z, the shape transitions become more gradual as triaxiality sets in, yet the coexistence of varying shapes continues to play an important role in the low-energy nuclear structure, particularly in the odd-Z isotopes. Furthermore, this work aims to characterize competing shapes in the triaxial region between Zr and Sn isotopes using ultrafast timing techniques to measure lifetimes of excited states in the neutron-rich nucleus ¹⁰⁹Rh. The measurements confirm the persistence at higher Z of similarly large deformations observed near Z = 40. Moreover, we show that new self-consistent mean-field calculations, with proper treatment of the odd nucleon, are able to reproduce the coexisting triaxial and highly deformed configurations revealing, for the first time, the important contribution of the unpaired nucleon to these different shapes based on the blocking of specific single-particle orbitals.

View Accepted Manuscript (DOE)

Research Organization:: Idaho National Laboratory (INL), Idaho Falls, ID (United States)

Sponsoring Organization:: Academy of Finland; EU 6th Framework Program; Idaho Operations Office; Spanish Minestry of Economy and Competitiveness; US National Science Foundation; USDOE

Grant/Contract Number:: AC07-05ID14517

Other Award/Contract Number:: PHY0822648
PHY0758100
PHY1419765

OSTI ID:: 1891494

Alternate ID(s):: OSTI ID: 1488629

Report Number(s):: INL/JOU-18-45502-Rev001

Journal Information:: Physical Review. C, Journal Name: Physical Review. C Journal Issue: 6 Vol. 98; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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New insights into triaxiality and shape coexistence from odd-mass Rh 109

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