Decomposition of M1 transitions into isoscalar and isovector, spin and orbital contributions

Y. Fujita, T. Adachi, G. P.A. Berg, B. A. Brown, H. Ejiri, H. Fujimura, H. Fujita, M. Fujiwara, K. Hara, M. N. Harakeh, K. Hatanaka, F. Hofmann, J. Kamiya, K. Katori, T. Kawabata, S. Mizutori, P. Von Neumann-Cosel, Tetsuo Noro, B. Reitz, A. RichterY. Shimbara, T. Shinada, H. Ueno, M. Yoshifuku, M. Yosoi

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Abstract

The electromagnetic M1 operator contains not only the usually dominant isovector (IV) spin (στ) term, but also IV orbital (lτ), isoscalar (IS) spin (σ) and IS orbital (l) terms. By using the facts that IS and IV terms couple with reverse signs in analogous M1 transitions in Tz = ±1/2 mirror nuclei and that Gamow-Teller (GT) operator contains only στ term, we discuss the separation of IS and IV terms of M1 transitions in Tz = ±1/2 nuclei and the contribution of lτ term in the IV term of Tz = 0 as well as ±1/2 nuclei, respectively. In deriving the latter, effects of meson exchange currents (MEC) are corrected. γ decay and (e, e′) data are used for the study of B(M1) strengths. The B(GT) values are studied in good-resolution (3He, t) reactions at 150 MeV/nucleon.

Original languageEnglish
Pages (from-to)243-246
Number of pages4
JournalNuclear Physics A
Volume690
Issue number1-3
DOIs
Publication statusPublished - Jul 16 2001

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decomposition
orbitals
nuclei
operators
mesons
mirrors
electromagnetism
decay

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

Fujita, Y., Adachi, T., Berg, G. P. A., Brown, B. A., Ejiri, H., Fujimura, H., ... Yosoi, M. (2001). Decomposition of M1 transitions into isoscalar and isovector, spin and orbital contributions. Nuclear Physics A, 690(1-3), 243-246. https://doi.org/10.1016/S0375-9474(01)00950-2

Decomposition of M1 transitions into isoscalar and isovector, spin and orbital contributions. / Fujita, Y.; Adachi, T.; Berg, G. P.A.; Brown, B. A.; Ejiri, H.; Fujimura, H.; Fujita, H.; Fujiwara, M.; Hara, K.; Harakeh, M. N.; Hatanaka, K.; Hofmann, F.; Kamiya, J.; Katori, K.; Kawabata, T.; Mizutori, S.; Von Neumann-Cosel, P.; Noro, Tetsuo; Reitz, B.; Richter, A.; Shimbara, Y.; Shinada, T.; Ueno, H.; Yoshifuku, M.; Yosoi, M.

In: Nuclear Physics A, Vol. 690, No. 1-3, 16.07.2001, p. 243-246.

Research output: Contribution to journalArticle

Fujita, Y, Adachi, T, Berg, GPA, Brown, BA, Ejiri, H, Fujimura, H, Fujita, H, Fujiwara, M, Hara, K, Harakeh, MN, Hatanaka, K, Hofmann, F, Kamiya, J, Katori, K, Kawabata, T, Mizutori, S, Von Neumann-Cosel, P, Noro, T, Reitz, B, Richter, A, Shimbara, Y, Shinada, T, Ueno, H, Yoshifuku, M & Yosoi, M 2001, 'Decomposition of M1 transitions into isoscalar and isovector, spin and orbital contributions', Nuclear Physics A, vol. 690, no. 1-3, pp. 243-246. https://doi.org/10.1016/S0375-9474(01)00950-2
Fujita, Y. ; Adachi, T. ; Berg, G. P.A. ; Brown, B. A. ; Ejiri, H. ; Fujimura, H. ; Fujita, H. ; Fujiwara, M. ; Hara, K. ; Harakeh, M. N. ; Hatanaka, K. ; Hofmann, F. ; Kamiya, J. ; Katori, K. ; Kawabata, T. ; Mizutori, S. ; Von Neumann-Cosel, P. ; Noro, Tetsuo ; Reitz, B. ; Richter, A. ; Shimbara, Y. ; Shinada, T. ; Ueno, H. ; Yoshifuku, M. ; Yosoi, M. / Decomposition of M1 transitions into isoscalar and isovector, spin and orbital contributions. In: Nuclear Physics A. 2001 ; Vol. 690, No. 1-3. pp. 243-246.
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T1 - Decomposition of M1 transitions into isoscalar and isovector, spin and orbital contributions

AU - Fujita, Y.

AU - Adachi, T.

AU - Berg, G. P.A.

AU - Brown, B. A.

AU - Ejiri, H.

AU - Fujimura, H.

AU - Fujita, H.

AU - Fujiwara, M.

AU - Hara, K.

AU - Harakeh, M. N.

AU - Hatanaka, K.

AU - Hofmann, F.

AU - Kamiya, J.

AU - Katori, K.

AU - Kawabata, T.

AU - Mizutori, S.

AU - Von Neumann-Cosel, P.

AU - Noro, Tetsuo

AU - Reitz, B.

AU - Richter, A.

AU - Shimbara, Y.

AU - Shinada, T.

AU - Ueno, H.

AU - Yoshifuku, M.

AU - Yosoi, M.

PY - 2001/7/16

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N2 - The electromagnetic M1 operator contains not only the usually dominant isovector (IV) spin (στ) term, but also IV orbital (lτ), isoscalar (IS) spin (σ) and IS orbital (l) terms. By using the facts that IS and IV terms couple with reverse signs in analogous M1 transitions in Tz = ±1/2 mirror nuclei and that Gamow-Teller (GT) operator contains only στ term, we discuss the separation of IS and IV terms of M1 transitions in Tz = ±1/2 nuclei and the contribution of lτ term in the IV term of Tz = 0 as well as ±1/2 nuclei, respectively. In deriving the latter, effects of meson exchange currents (MEC) are corrected. γ decay and (e, e′) data are used for the study of B(M1) strengths. The B(GT) values are studied in good-resolution (3He, t) reactions at 150 MeV/nucleon.

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