Isospin symmetry of Tz = ±3/2 → ±1/2 gamow-teller transitions in A = 37 and A = 41 nuclei

Y. Shimbara; Y. Fujita; T. Adachi; G. P.A. Berg; B. A. Brown; H. Fujimura; H. Fujita; K. Fujita; K. Hara; K. Y. Hara; K. Hatanaka; J. Kamiya; K. Katori; T. Kawabata; K. Nakanishi; N. Sakamoto; Y. Sakemi; Y. Shimizu; T. Tameshige; M. Uchida; T. Wakasa; M. Yoshifuku; M. Yosoi; R. G.T. Zegers

doi:10.1142/S0217732310000782

Isospin symmetry of T_z = ±3/2 → ±1/2 gamow-teller transitions in A = 37 and A = 41 nuclei

Y. Shimbara, Y. Fujita, T. Adachi, G. P.A. Berg, B. A. Brown, H. Fujimura, H. Fujita, K. Fujita, K. Hara, K. Y. Hara, K. Hatanaka, J. Kamiya, K. Katori, T. Kawabata, K. Nakanishi, N. Sakamoto, Y. Sakemi, Y. Shimizu, T. Tameshige, M. UchidaT. Wakasa, M. Yoshifuku, M. Yosoi, R. G.T. Zegers

Experimental Particle Physics

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Abstract

Under the assumption of good isospin symmetry, T_z = ±3/2 → ±1/2 Gamow-Teller (GT) transitions in a mass A isobar are analogous, where T_z is the z component of isospin T defined by 1/2(N - Z). We studied the T_z = +3/2 → +1/2 GT transitions by using the ³⁷Cl(³He,t)³⁷Ar and ⁴¹K( ³He,t)⁴¹Ca reactions at E_beam = 140 MeV/nucleon. The GT transition strengths in ³⁷Ar and ⁴¹Ca were obtained up to the excitation energy (E_x) of 14.2 MeV and 10.4 MeV with energy resolutions of 30 and 35 keV, respectively. The obtained GT strengths were compared with those of the T_z = -2/3 → -1/2 mirror transitions, measured by the β-decay of ³⁷Ca and ⁴¹Ti, respectively. It was found that the overall distributions of the mirror transitions were similar in both A = 37 and A = 41 systems. In A = 37 the differences seen at lower excitation energies are suggested to be the effect of the tensor interaction in the charge-exchange reaction. The differences seen at higher excitation energies are suggested to be the effect of the Coulomb interaction that can break the mirror symmetry of the strength distributions.

Original language	English
Pages (from-to)	1976-1979
Number of pages	4
Journal	Modern Physics Letters A
Volume	25
Issue number	21-23
DOIs	https://doi.org/10.1142/S0217732310000782
Publication status	Published - Jul 30 2010

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Astronomy and Astrophysics
Physics and Astronomy(all)

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10.1142/S0217732310000782

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Shimbara, Y., Fujita, Y., Adachi, T., Berg, G. P. A., Brown, B. A., Fujimura, H., Fujita, H., Fujita, K., Hara, K., Hara, K. Y., Hatanaka, K., Kamiya, J., Katori, K., Kawabata, T., Nakanishi, K., Sakamoto, N., Sakemi, Y., Shimizu, Y., Tameshige, T., ... Zegers, R. G. T. (2010). Isospin symmetry of T_z = ±3/2 → ±1/2 gamow-teller transitions in A = 37 and A = 41 nuclei. Modern Physics Letters A, 25(21-23), 1976-1979. https://doi.org/10.1142/S0217732310000782

Shimbara, Y, Fujita, Y, Adachi, T, Berg, GPA, Brown, BA, Fujimura, H, Fujita, H, Fujita, K, Hara, K, Hara, KY, Hatanaka, K, Kamiya, J, Katori, K, Kawabata, T, Nakanishi, K, Sakamoto, N, Sakemi, Y, Shimizu, Y, Tameshige, T, Uchida, M, Wakasa, T, Yoshifuku, M, Yosoi, M & Zegers, RGT 2010, 'Isospin symmetry of T_z = ±3/2 → ±1/2 gamow-teller transitions in A = 37 and A = 41 nuclei', Modern Physics Letters A, vol. 25, no. 21-23, pp. 1976-1979. https://doi.org/10.1142/S0217732310000782

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title = "Isospin symmetry of Tz = ±3/2 → ±1/2 gamow-teller transitions in A = 37 and A = 41 nuclei",

abstract = "Under the assumption of good isospin symmetry, Tz = ±3/2 → ±1/2 Gamow-Teller (GT) transitions in a mass A isobar are analogous, where Tz is the z component of isospin T defined by 1/2(N - Z). We studied the Tz = +3/2 → +1/2 GT transitions by using the 37Cl(3He,t)37Ar and 41K( 3He,t)41Ca reactions at Ebeam = 140 MeV/nucleon. The GT transition strengths in 37Ar and 41Ca were obtained up to the excitation energy (Ex) of 14.2 MeV and 10.4 MeV with energy resolutions of 30 and 35 keV, respectively. The obtained GT strengths were compared with those of the Tz = -2/3 → -1/2 mirror transitions, measured by the β-decay of 37Ca and 41Ti, respectively. It was found that the overall distributions of the mirror transitions were similar in both A = 37 and A = 41 systems. In A = 37 the differences seen at lower excitation energies are suggested to be the effect of the tensor interaction in the charge-exchange reaction. The differences seen at higher excitation energies are suggested to be the effect of the Coulomb interaction that can break the mirror symmetry of the strength distributions.",

author = "Y. Shimbara and Y. Fujita and T. Adachi and Berg, {G. P.A.} and Brown, {B. A.} and H. Fujimura and H. Fujita and K. Fujita and K. Hara and Hara, {K. Y.} and K. Hatanaka and J. Kamiya and K. Katori and T. Kawabata and K. Nakanishi and N. Sakamoto and Y. Sakemi and Y. Shimizu and T. Tameshige and M. Uchida and T. Wakasa and M. Yoshifuku and M. Yosoi and Zegers, {R. G.T.}",

year = "2010",

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doi = "10.1142/S0217732310000782",

language = "English",

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T1 - Isospin symmetry of Tz = ±3/2 → ±1/2 gamow-teller transitions in A = 37 and A = 41 nuclei

AU - Shimbara, Y.

AU - Fujita, Y.

AU - Adachi, T.

AU - Berg, G. P.A.

AU - Brown, B. A.

AU - Fujimura, H.

AU - Fujita, H.

AU - Fujita, K.

AU - Hara, K.

AU - Hara, K. Y.

AU - Hatanaka, K.

AU - Kamiya, J.

AU - Katori, K.

AU - Kawabata, T.

AU - Nakanishi, K.

AU - Sakamoto, N.

AU - Sakemi, Y.

AU - Shimizu, Y.

AU - Tameshige, T.

AU - Uchida, M.

AU - Wakasa, T.

AU - Yoshifuku, M.

AU - Yosoi, M.

AU - Zegers, R. G.T.

PY - 2010/7/30

Y1 - 2010/7/30

N2 - Under the assumption of good isospin symmetry, Tz = ±3/2 → ±1/2 Gamow-Teller (GT) transitions in a mass A isobar are analogous, where Tz is the z component of isospin T defined by 1/2(N - Z). We studied the Tz = +3/2 → +1/2 GT transitions by using the 37Cl(3He,t)37Ar and 41K( 3He,t)41Ca reactions at Ebeam = 140 MeV/nucleon. The GT transition strengths in 37Ar and 41Ca were obtained up to the excitation energy (Ex) of 14.2 MeV and 10.4 MeV with energy resolutions of 30 and 35 keV, respectively. The obtained GT strengths were compared with those of the Tz = -2/3 → -1/2 mirror transitions, measured by the β-decay of 37Ca and 41Ti, respectively. It was found that the overall distributions of the mirror transitions were similar in both A = 37 and A = 41 systems. In A = 37 the differences seen at lower excitation energies are suggested to be the effect of the tensor interaction in the charge-exchange reaction. The differences seen at higher excitation energies are suggested to be the effect of the Coulomb interaction that can break the mirror symmetry of the strength distributions.

AB - Under the assumption of good isospin symmetry, Tz = ±3/2 → ±1/2 Gamow-Teller (GT) transitions in a mass A isobar are analogous, where Tz is the z component of isospin T defined by 1/2(N - Z). We studied the Tz = +3/2 → +1/2 GT transitions by using the 37Cl(3He,t)37Ar and 41K( 3He,t)41Ca reactions at Ebeam = 140 MeV/nucleon. The GT transition strengths in 37Ar and 41Ca were obtained up to the excitation energy (Ex) of 14.2 MeV and 10.4 MeV with energy resolutions of 30 and 35 keV, respectively. The obtained GT strengths were compared with those of the Tz = -2/3 → -1/2 mirror transitions, measured by the β-decay of 37Ca and 41Ti, respectively. It was found that the overall distributions of the mirror transitions were similar in both A = 37 and A = 41 systems. In A = 37 the differences seen at lower excitation energies are suggested to be the effect of the tensor interaction in the charge-exchange reaction. The differences seen at higher excitation energies are suggested to be the effect of the Coulomb interaction that can break the mirror symmetry of the strength distributions.

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U2 - 10.1142/S0217732310000782

DO - 10.1142/S0217732310000782

M3 - Article

AN - SCOPUS:77954823809

SN - 0217-7323

VL - 25

SP - 1976

EP - 1979

JO - Modern Physics Letters A

JF - Modern Physics Letters A

IS - 21-23

ER -

Isospin symmetry of T_z = ±3/2 → ±1/2 gamow-teller transitions in A = 37 and A = 41 nuclei

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