β decay of 97Ag: Evidence for the Gamow-Teller resonance near 100Sn

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

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Abstract

In two complementary measurements, a cubelike array of 6 Euroball-Cluster germanium detectors and a total-absorption γ-spectrometer were used to investigate the β decay of 97Ag, a three proton-hole nucleus with respect to the 100Sn core. The half-life and QEC value of the decay of the 9/2+ ground state of 97Ag were determined to be 25.9(4) s and 6.98(11) MeV, respectively. A total of 603 γ rays (578 new) was observed, and 151 levels (132 new) in 97Pd have been identified. An interesting β-delayed γ cascade was observed, which comprises 6 γ-transitions with a deexcitation pattern involving an initial increase of the level spin. The Gamow-Teller (GT) β-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 97Pd, 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
Pages (from-to)243151-2431517
Number of pages2188367
JournalPhysical Review C - Nuclear Physics
Volume60
Issue number2
Publication statusPublished - Aug 1999

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decay
ground state
half life
germanium
rays
cascades
spectrometers
nuclei
protons
detectors
polarization
predictions
excitation
energy

ASJC Scopus subject areas

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

Cite this

Hu, Z., Batist, L., Agramunt, J., Algora, A., Brown, B. A., Cano-Ott, D., ... Wittmann, V. (1999). β decay of 97Ag: Evidence for the Gamow-Teller resonance near 100Sn. Physical Review C - Nuclear Physics, 60(2), 243151-2431517.

β decay of 97Ag : Evidence for the Gamow-Teller resonance near 100Sn. / 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.; Rubio, B.; Shibata, M.; Szerypo, J.; Tain, J. L.; Wittmann, V.

In: Physical Review C - Nuclear Physics, Vol. 60, No. 2, 08.1999, p. 243151-2431517.

Research output: Contribution to journalArticle

Hu, Z, Batist, L, Agramunt, J, Algora, A, Brown, BA, 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, Rubio, B, Shibata, M, Szerypo, J, Tain, JL & Wittmann, V 1999, 'β decay of 97Ag: Evidence for the Gamow-Teller resonance near 100Sn', Physical Review C - Nuclear Physics, vol. 60, no. 2, pp. 243151-2431517.
Hu Z, Batist L, Agramunt J, Algora A, Brown BA, Cano-Ott D et al. β decay of 97Ag: Evidence for the Gamow-Teller resonance near 100Sn. Physical Review C - Nuclear Physics. 1999 Aug;60(2):243151-2431517.
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. ; Rubio, B. ; Shibata, M. ; Szerypo, J. ; Tain, J. L. ; Wittmann, V. / β decay of 97Ag : Evidence for the Gamow-Teller resonance near 100Sn. In: Physical Review C - Nuclear Physics. 1999 ; Vol. 60, No. 2. pp. 243151-2431517.
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AU - Hu, Z.

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AU - Algora, A.

AU - Brown, B. A.

AU - Cano-Ott, D.

AU - Collatz, R.

AU - Gadea, A.

AU - Gierlik, M.

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AU - Grawe, H.

AU - Hellström, M.

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AU - Moroz, F.

AU - Płochocki, A.

AU - Rejmund, M.

AU - Roeckl, E.

AU - Rubio, B.

AU - Shibata, M.

AU - Szerypo, J.

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AU - Wittmann, V.

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N2 - In two complementary measurements, a cubelike array of 6 Euroball-Cluster germanium detectors and a total-absorption γ-spectrometer were used to investigate the β decay of 97Ag, a three proton-hole nucleus with respect to the 100Sn core. The half-life and QEC value of the decay of the 9/2+ ground state of 97Ag were determined to be 25.9(4) s and 6.98(11) MeV, respectively. A total of 603 γ rays (578 new) was observed, and 151 levels (132 new) in 97Pd have been identified. An interesting β-delayed γ cascade was observed, which comprises 6 γ-transitions with a deexcitation pattern involving an initial increase of the level spin. The Gamow-Teller (GT) β-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 97Pd, 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.

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