Münster 2002 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 45: Nuclear Physics / Spectroscopy VII

HK 45.4: Vortrag

Donnerstag, 14. März 2002, 17:15–17:30, B

γ-Spectroscopy of ⁴⁰Ca and ⁴²Ca — •S. Torilov¹, S. Thummerer¹, W. von Oertzen¹, B. Gebauer¹, H.G. Bohlen¹, Tz. Kokalova¹, A. Tumino¹, G. de Angelis², M. Axiotis², A. Gadea², E. Farnea², N. Marginean², T. Martinez², D.R. Napoli², M. De Poli², S.M. Lenzi³, C. Ur³, C. Beck⁴, M. Rousseau⁴, and P. Papka⁴ — ¹Hahn-Meitner-Institut Berlin — ²INFN, Laboratori Nazionali di Legnaro — ³Dipartimento di Fisica and INFN, Padova — ⁴Institut de Recherches Subatomiques

In the present work high-lying levels of two even isotopes of Ca were studied using particle-γ coincidence. To select the reaction channels for γ-spectroscopy the Si-ball ISIS has been used in combination with the GASP γ-detector array at LNL Legnaro.

From this experiment 19 new levels and 25 new transitions for ⁴⁰Ca for excitation energies up to 21 MeV and 5 new levels and 5 new transitions for ⁴²Ca up to 13 MeV were found. The present data show in ⁴⁰Ca clearly sperarated rotational bands with a 4p-4h and 8p-8h structure and a mixture of different structures in the yrast line.

For ⁴²Ca some very good candidates were found for the 12⁺ state of the 6p-4h band.