Spectroscopy of 13Be through isobaric analog states in 13B

被引：0

作者：

Hunt, C. ^{[1
,2
,9
]}

Ahn, S. ^{[2
,10
]}

Bishop, J. ^{[2
]}

Koshchiy, E. ^{[2
]}

Aboud, E. ^{[1
,2
,11
]}

Alcorta, M. ^{[3
]}

Bosh, A. ^{[1
,2
]}

Hahn, K. ^{[4
,5
]}

Han, S. ^{[4
]}

Parker, C. E.

Pollacco, E. C. ^{[6
]}

Roeder, B. T. ^{[2
]}

Roosa, M. ^{[1
,2
]}

Upadhyayula, S. ^{[1
,2
,12
]}

Volya, A. S. ^{[7
]}

Rogachev, G. V. ^{[1
,2
,8
]}

机构：

[1] Texas A&M Univ, Dept Phys & Astron, College Stn, TX 77843 USA

[2] Texas A&M Univ, Cyclotron Inst, College Stn, TX 77843 USA

[3] TRIUMF, Vancouver, BC V6T 2A3, Canada

[4] Ewha Womans Univ, Seoul 03760, South Korea

[5] Inst for Basic Sci Korea, Ctr Exot Nucl Studies, Daejeon 34126, South Korea

[6] Univ Paris Saclay, CEA, IRFU, F-91190 Gif Sur Yvette, France

[7] Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA

[8] Texas A&M Univ, Nucl Solut Inst, College Stn, TX 77843 USA

[9] Michigan State Univ, Facil Rare Isotope Beams, E Lansing, MI USA

[10] Inst for Basic Sci Korea, Ctr Exot Nucl Studies, Daejeon, South Korea

[11] Lawrence Livermore Natl Lab, Livermore, CA USA

[12] TRIUMF, Vancouver, BC, Canada

来源：

PHYSICAL REVIEW C | 2023年 / 108卷 / 05期

关键词：

ENERGY-LEVELS; BE-14;

D O I：

10.1103/PhysRevC.108.L051606

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Background: Spectroscopy of the exotic, neutron unbound beryllium isotope 13Be is still a puzzle despite significant experimental efforts.Purpose: We aim to observe T = 5/2 states in 13B, establish spin-parities and spectroscopic factors, and use isospin symmetry to inform spectroscopy of 13Be. Methods: Excitation functions for resonance elastic scattering of 12Be on protons were measured in the center -of-mass energy range from 1 to 5 MeV.Results: Two T = 5/2 states in 13B at excitation energies 18.25 and 19.95 MeV were observed. Unambiguous 1/2+ and 5/2+ spin-parity assignments were made, and spectroscopic factors were established using the R -matrix analysis of the measured 12Be +p excitation functions.Conclusions: 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 relatively small spectroscopic factor.

引用

页数：6

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