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Suppression of Gamo...
Suppression of Gamow-Teller and M1 transitions in deformed mirror nuclei Mg-25 and Al-25 - Direct observation of K selection rules
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Shimbara, Y (författare)
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Fujita, Y (författare)
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Adachi, T (författare)
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Berg, GPA (författare)
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Fujita, H (författare)
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Fujita, K (författare)
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- Hamamoto-Kuroda, Ikuko (författare)
- Lund University,Lunds universitet,Matematisk fysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Mathematical Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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Hatanaka, K (författare)
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Kamiya, J (författare)
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Nakanishi, K (författare)
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Sakemi, Y (författare)
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Shimizu, Y (författare)
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Uchida, M (författare)
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Wakasa, T (författare)
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Yosoi, M (författare)
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(creator_code:org_t)
- Springer Science and Business Media LLC, 2004
- 2004
- Engelska.
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Ingår i: European Physical Journal A. Hadrons and Nuclei. - : Springer Science and Business Media LLC. - 1434-6001. ; 19:1, s. 25-31
- Relaterad länk:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The mirror nuclei Mg-25 and Al-25 are expected to have very similar structures. The Gamow-Teller (GT) transitions from the J(pi) = 5/2(+) ground state of Mg-25 to the excited states in Al-25 were studied by high-resolution measurements of the Mg-25(He-3,t) charge-exchange reaction at 0degrees and at 140 MeV/nucleon. Assuming the usual DeltaJ(pi) = 1(+) selection rule for the spin-isospin-type GT transitions, the states with J(pi) = 3/2(+), 5/2(+), and 7/2 (+) should be excited. However, of the more than ten states with these J(pi) values below 6 MeV excitation energy, only the 5/2 (+) ground state and the 7/2 (+) , 1.613 MeV state in Al-25 were strongly populated, while all other states were strongly suppressed. The analysis of M1 transitions in Mg-25 also suggested a very similar feature for the analogous M1 transitions. Both Mg-25 and Al-25 are known to be largely deformed, and most low-lying states can be interpreted in terms of one-particle quantum numbers in the deformed potential and the associated rotational spectra. The observed suppression can be explained in terms of the K quantum number selection rules that are inherent to axially deformed nuclei.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
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Shimbara, Y
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Fujita, Y
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Adachi, T
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Berg, GPA
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Fujita, H
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Fujita, K
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visa fler...
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Hamamoto-Kuroda, ...
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Hatanaka, K
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Kamiya, J
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Nakanishi, K
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Sakemi, Y
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Shimizu, Y
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Uchida, M
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Wakasa, T
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Yosoi, M
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visa färre...
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