[Formula Presented] decay of [Formula Presented]: Evidence for the Gamow-Teller resonance near [Formula Presented]

Z. Hu, L. Batist, J. Agramunt, A. Algora, B. A. Brown, D. Cano-Ott, R. Collatz, A. Gadea, M. Gierlik, M. Górska, H. Grawe, M. Hellström, Z. Janas, M. Karny, R. Kirchner, F. Moroz, A. Płochocki, M. Rejmund, E. Roeckl, B. RubioM. Shibata, J. Szerypo, J. L. Tain, V. Wittmann

Research output: Contribution to journalArticle

Abstract

In two complementary measurements, a cubelike array of 6 Euroball-Cluster germanium detectors and a total-absorption [Formula Presented]-spectrometer were used to investigate the [Formula Presented] decay of [Formula Presented], a three proton-hole nucleus with respect to the [Formula Presented] core. The half-life and [Formula Presented] value of the decay of the [Formula Presented] ground state of [Formula Presented] were determined to be 25.9(4) s and 6.98(11) MeV, respectively. A total of 603 [Formula Presented] rays (578 new) was observed, and 151 levels (132 new) in [Formula Presented] have been identified. An interesting [Formula Presented]-delayed [Formula Presented] cascade was observed, which comprises 6 [Formula Presented]-transitions with a deexcitation pattern involving an initial increase of the level spin. The Gamow-Teller (GT) [Formula Presented]-decay strength distributions from the two measurements reveal a large GT resonance around 4 MeV with a width of about 1.8 MeV. The hindrance factor for the total GT strength, summed from the ground state up to 6 MeV excitation energy in [Formula Presented], amounts to 4.3(6) with reference to a shell-model prediction. This factor is discussed in comparison with a core polarization and a Monte Carlo shell-model calculation.

Original languageEnglish
Number of pages1
JournalPhysical Review C - Nuclear Physics
Volume60
Issue number2
DOIs
Publication statusPublished - Jan 1 1999

    Fingerprint

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Hu, Z., Batist, L., Agramunt, J., Algora, A., Brown, B. A., Cano-Ott, D., Collatz, R., Gadea, A., Gierlik, M., Górska, M., Grawe, H., Hellström, M., Janas, Z., Karny, M., Kirchner, R., Moroz, F., Płochocki, A., Rejmund, M., Roeckl, E., ... Wittmann, V. (1999). [Formula Presented] decay of [Formula Presented]: Evidence for the Gamow-Teller resonance near [Formula Presented]. Physical Review C - Nuclear Physics, 60(2). https://doi.org/10.1103/PhysRevC.60.024315