Title: Lifetime measurements of states of ${}^{35}\mathrm{S}$ , ${}^{36}\mathrm{S}$ , ${}^{37}\mathrm{S}$ , and ${}^{38}\mathrm{S}$ using the AGATA $\gamma$ -ray tracking spectrometer

Abstract

Lifetimes or lifetime limits of a small number of excited states of the sulfur isotopes with mass numbers A = 35 , 36, 37, and 38 have been measured using the differential recoil-distance method. The isotopes of sulfur were populated in binary grazing reactions initiated by a beam of ³⁶S ions of energy 225 MeV incident on a thin ²⁰⁸Pb target which was mounted in the Cologne plunger apparatus. The combination of the PRISMA magnetic spectrometer and an early implementation of the AGATA γ-ray tracking array was used to detect γ rays in coincidence with projectile-like nuclear species. Lifetime measurements of populated states were measured within the range from about 1 to 100 ps. The number of states for which lifetime measurements or lifetime limits were possible was limited by statistics. For ³⁵S, the lifetime was determined for the first 1/2⁺ state at 1572 keV; the result is compared with a previous published lifetime value. The lifetime of the 3^- state of ³⁶S at 4193 keV was determined and compared with earlier measurements. No previous lifetime information exists for the (6⁺) state at 6690 keV; a lifetime measurement with large associated error was made in the present work. For ³⁷S,more » the states for which lifetime limits were established were those at 646 keV with J^π = 3/2^- and at 2776 keV with J^π = 11/2^-; there are no previously published lifetime values for excited states of ³⁷S. Finally, a lifetime limit was established for the J^π =(6⁺) state of ³⁸S at 3675 keV; no lifetime information exists for this state in the literature. Measured lifetime values were compared with the results of state-of-the-art shell-model calculations based on the PSDPF, SDPF-U, and FSU effective interactions. In addition, nuclear magnetic-dipole and electric-quadrupole moments, branching ratios, mixing ratios, and electromagnetic transition rates, where available, have been compared with shell-model values. The current work suffers from poor statistics; nevertheless, lifetime values and limits have been possible, allowing a useful discussion of the ability of state-of-the-art shell-model calculations to reproduce the experimental results.« less

Authors:

Grocutt, L. ^[1]; Chapman, R.  ^[1];

• Search DOE PAGES for author "Chapman, R."
• Search DOE PAGES for ORCID "0000-0001-9338-9905"

Bouhelal, M. ^[2]; Haas, F. ^[3]; Goasduff, A. ^[4]; Smith, J. F. ^[1]; Lubna, R. S. ^[5]; Courtin, S. ^[3]; Bazzacco, D. ^[6]; Braunroth, T. ^[7]; Capponi, L. ^[8]; Corradi, L. ^[4]; Derkx, X. ^[1]; Desesquelles, P. ^[9]; Doncel, M. ^[10]; Fioretto, E. ^[4]; Gottardo, A. ^[4]; Liberati, V. ^[1]; Melon, B. ^[11]; Mengoni, D. ^[6] more »; Michelagnoli, C. ^[12]; Mijatović, T. ^[13]; Modamio, V. ^[4]; Montagnoli, G. ^[6]; Montanari, D. ^[6]; Mulholland, K. F. ^[1]; Napoli, D. R. ^[4]; Petrache, C. M. ^[14]; Pipidis, A. ^[4]; Recchia, F. ^[6]; Sahin, E. ^[15]; Singh, P. P. ^[16]; Stefanini, A. M. ^[4]; Szilner, S. ^[13]; Valiente-Dobón, J. J. ^[4] « less

---

+ Show Author Affiliations

1. University of the West of Scotland, Paisley (United Kingdom); Scottish Universities Physics Alliance (SUPA) (United Kingdom)
2. Université Larbi Tébessi, Tébessa (Algeria)
3. University of Strasbourg (France); Centre National de la Recherche Scientifique (CNRS), Strasbourg (France)
4. Laboratori Nazionali di Legnaro, Padova (Italy)
5. Florida State University, Tallahassee, FL (United States); TRIUMF, Vancouver, BC (Canada)
6. Universitá degli Studi di Padova (Italy); Istituto Nazionale di Fisica Nucleare, Sezione di Padova (Italy)
7. University zu Koln (Germany)
8. University of the West of Scotland, Paisley (United Kingdom); Scottish Universities Physics Alliance (SUPA) (United Kingdom); Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH), Bucharest (Romania)
9. University Paris-Sud, Orsay (France); Université Paris-Saclay, Orsay (France)
10. Universidad de Salamanca (Spain); University of Liverpool (United Kingdom)
11. University of Florence (Italy)
12. Institute Laue-Langevin, Grenoble (France)
13. Ruder Bošković Institute, Zagreb (Croatia)
14. Université Paris-Saclay, Orsay (France)
15. Laboratori Nazionali di Legnaro, Padova (Italy); University of Oslo (Norway)
16. Indian Inst. of Technology (IIT), Ropar (India)

Publication Date:

Tue Aug 16 00:00:00 EDT 2022

Research Org.:

Florida State Univ., Tallahassee, FL (United States)

Sponsoring Org.:

USDOE Office of Science (SC), Nuclear Physics (NP); Science and Technologies Facility Council (STFC); National Science Foundation (NSF); Natural Sciences and Engineering Research Council of Canada (NSERC); Croatian Science Foundation

OSTI Identifier:

1979897

Grant/Contract Number:  

SC0009883; ST/L005808/1; ST/P005101/1; PHY-1712953

Resource Type:

Accepted Manuscript

Journal Name:

Physical Review. C

Additional Journal Information:

Journal Volume: 106; Journal Issue: 2; Journal ID: ISSN 2469-9985

Publisher:

American Physical Society (APS)

Country of Publication:

United States

Language:

English

Subject:

nuclear physics; electromagnetic transitions; lifetimes and widths; nuclear structure and decays; shell model