Observation of Low- and High-Energy Gamow-Teller Phonon Excitations in Nuclei

Fujita, Y.; Fujita, H.; Adachi, T.; BAI, C.; Algora, A.; Berg, G.; VON BRENTANO, P.; COLO, G.; CSATLOS, M.; Deaven, J.; ESTEVEZ-AGUADO, E.; FRANSEN, C.; DE FRENNE, D.; Fujita, K.; Ganioglu, Ela; Guess, C.; Gulyas, J.; Hatanaka, K.; Hirota, K.; Honma, M.; Ishikawa, D.; JACOBS, E.; KRASZNAHORKAY, A.; Matsubara, H.; MATSUYANAGI, K.; Meharchand, R.; Molina, F.; MUTO, K.; Nakanishi, K.; Negret, A.; Okamura, H.; Ong, H.; Otsuka, T.; Pietralla, N.; Perdikakis, G.; Popescu, L.; Rubio, B.; SAGAWA, H.; SARRIGUREN, P.; Scholl, C.; Shimbara, Y.; Shimizu, Y.; Susoy, Gülfem; Suzuki, T.; Tameshige, Y.; Tamii, A.; THIES, J.; Uchida, M.; Wakasa, T.; Yosoi, M.; Zegers, R.; ZELL, K.; Zenihiro, J.

doi:10.1103/physrevlett.112.112502

Observation of Low- and High-Energy Gamow-Teller Phonon Excitations in Nuclei

Atıf İçin Kopyala

Fujita Y., Fujita H., Adachi T., BAI C. L., Algora A., Berg G. P. A., ...Daha Fazla

PHYSICAL REVIEW LETTERS, cilt.112, sa.11, 2014 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 112 Sayı: 11
Basım Tarihi: 2014
Doi Numarası: 10.1103/physrevlett.112.112502
Dergi Adı: PHYSICAL REVIEW LETTERS
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
İstanbul Üniversitesi Adresli: Evet

Özet

Gamow-Teller (GT) transitions in atomic nuclei are sensitive to both nuclear shell structure and effective residual interactions. The nuclear GT excitations were studied for the mass number A = 42, 46, 50, and 54 "f-shell" nuclei in (He-3, t) charge-exchange reactions. In the Ca-42 -> Sc-42 reaction, most of the GT strength is concentrated in the lowest excited state at 0.6 MeV, suggesting the existence of a low-energy GT phonon excitation. As A increases, a high-energy GT phonon excitation develops in the 6-11 MeV region. In the Fe-54 -> Co-54 reaction, the high-energy GT phonon excitation mainly carries the GT strength. The existence of these two GT phonon excitations are attributed to the 2 fermionic degrees of freedom in nuclei.