Prompt and delayed spectroscopy of At 203 : Observation of a shears band and a 29 / 2 + isomeric state

Using fusion-evaporation reactions, a gas-filled recoil separator, recoil-gating technique and recoil-isomer decay tagging technique we have extended the level scheme of At-203 (N = 118) significantly. We have observed an isomeric [tau = 14.1(3) mu s] state with a spin and parity of 29/2(+). The iso...

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Veröffentlicht in:	Physical review. C 2018-02, Vol.97 (2), Article 024301
Hauptverfasser:	Auranen, K., Uusitalo, J., Juutinen, S., Badran, H., Defranchi Bisso, F., Cox, D., Grahn, T., Greenlees, P. T., Herzáň, A., Jakobsson, U., Julin, R., Konki, J., Leino, M., Lightfoot, A., Mallaburn, M. J., Neuvonen, O., Pakarinen, J., Papadakis, P., Partanen, J., Rahkila, P., Sandzelius, M., Sarén, J., Scholey, C., Sorri, J., Stolze, S., Wang, Y. K.
Format:	Artikel
Sprache:	eng
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Zusammenfassung:	Using fusion-evaporation reactions, a gas-filled recoil separator, recoil-gating technique and recoil-isomer decay tagging technique we have extended the level scheme of At-203 (N = 118) significantly. We have observed an isomeric [tau = 14.1(3) mu s] state with a spin and parity of 29/2(+). The isomeric state is suggested to originate from the pi(h(9/2)) circle times \|Po-202; 11(-)> coupling, and it is depopulated through 286 keV E2 and 366 keV E3 transitions. In addition, we have observed a cascade of magnetic-dipole transitions which is suggested to be generated by the shears mechanism.
ISSN:	2469-9985 2469-9993 2469-9993
DOI:	10.1103/PhysRevC.97.024301