Spectroscopy of 13Be through isobaric analog states in 13B

Hunt, C.; Ahn, S.; Bishop, J.; Koshchiy, E.; Aboud, E.; Alcorta, M.; Bosh, A.; Hahn, K.; Han, S.; Parker, C. E.; Pollacco, E. C.; Roeder, B. T.; Roosa, M.; Upadhyayula, S.; Volya, A. S.; Rogachev, G. V.

doi:10.1103/PhysRevC.108.L051606

Spectroscopy of ¹³Be through isobaric analog states in ¹³B

Journal Article · Mon Nov 20 00:00:00 EST 2023 · Physical Review. C

DOI:https://doi.org/10.1103/PhysRevC.108.L051606· OSTI ID:2881914

Hunt, C. ^[1]; ^[2]; ^[3]; ^[3]; ^[4]; Alcorta, M. ^[5]; Bosh, A. ^[3]; Hahn, K. ^[6]; Han, S. ^[7]; Parker, C. E. ^[3]; ^[8]; Roeder, B. T. ^[3]; ^[3]; Upadhyayula, S. ^[9]; ^[10]; ^[3]

Texas A&M University, College Station, TX (United States); Michigan State University, East Lansing, MI (United States)
Texas A&M University, College Station, TX (United States); Institute for Basic Science, Daejeon (Korea)
Texas A&M University, College Station, TX (United States)
Texas A&M University, College Station, TX (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
TRIUMF, Vancouver, BC (Canada)
Ewha Womans University, Seoul (Korea, Republic of); Institute for Basic Science, Daejeon (Korea, Republic of)
Ewha Womans University, Seoul (Korea, Republic of)
Université Paris-Saclay, Gif-Sur-Yvette (France)
Texas A&M University, College Station, TX (United States); TRIUMF, Vancouver, BC (Canada)
Florida State University, Tallahassee, FL (United States)

Spectroscopy of the exotic, neutron-unbound beryllium isotope, ¹³Be, is still a puzzle despite significant experimental efforts. To observe T = 5/2 states in ¹³B, establish spin parities and spectroscopic factors, and use isospin symmetry to inform spectroscopy of ¹³Be, excitation functions for resonance elastic scattering of ¹²Be on protons were measured in the c.m. energy range from 1 MeV to 5 MeV. Two T = 5/2 states in ¹³B at excitation energies 18.25 MeV and 19.95 MeV were observed. Unambiguous 1/2⁺ and 5/2⁺ spin-parity assignments were made, and spectroscopic factors were established using R-matrix analysis of the measured ¹²Be + p excitation functions. Here, we provide the first direct and unambiguous spin-parity assignments and spectroscopic factor measurements for the resonances in the A = 13, T = 5/2 isobaric multiplet. This puts us on a solid footing to identify the 2.3 MeV state in ¹³Be as 5/2⁺ and infer the existence of an s-wave (1/2⁺) resonance at around 0.6 MeV with a relatively small spectroscopic factor.

View Accepted Manuscript (DOE)

Research Organization:: Florida State University, Tallahassee, FL (United States); Texas A & M Univ., College Station, TX (United States). Cyclotron Institute

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: FG02-93ER40773; NA0003841; SC0009883

OSTI ID:: 2881914

Alternate ID(s):: OSTI ID: 2329282

Journal Information:: Physical Review. C, Journal Name: Physical Review. C Journal Issue: 5 Vol. 108; ISSN 2469-9985; ISSN 2469-9993

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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