2020 Impact factor 3.043
Hadrons and Nuclei

Eur. Phys. J. A 9, 303-305

Short note

New isotope \ensuremath{\mathsf{^{233}Am}}

M. Sakama1,2 - K. Tsukada1 - M. Asai1 - S. Ichikawa1 - H. Haba1 - S. Goto1,3 - Y. Oura2 - I. Nishinaka1 - Y. Nagame1 - M. Shibata4 - Y. Kojima5 - K. Kawade4 - M. Ebihara2 - H. Nakahara2

1 Advanced Science Research Center, Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195, Japan
2 Department of Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
3 Department of Chemistry, Niigata University, Niigata 950-2181, Japan
4 Department of Energy Engineering and Science, Nagoya University, Nagoya 464-8603, Japan
5 Applied Nuclear Physics, Faculty of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan

Received: 5 September 2000
Communicated by D. Guerreau

The new neutron-deficient americium isotope \ensuremath{\mathsf{^{233}Am}} produced via the \ensuremath{\mathsf{^{233}U}}( \ensuremath{\mathsf{^{6}Li}}, 6n) reaction has been identified using the JAERI on-line isotope separator (JAERI-ISOL) coupled to a gas-jet transport system. The $\alpha$-decay of \ensuremath{\mathsf{^{233}Am}} and its subsequent $\alpha$-decay chain have been observed in the mass-233 fraction. The half-life and $\alpha$-particle energy of \ensuremath{\mathsf{^{233}Am}} have been determined to be $3.2 \pm 0.8$ min and $6780 \pm 17$ keV, respectively. From these results and a deduced $\alpha$-decay branching ratio, the observed $\alpha$-decay is regarded as a favored transition.

23.60.+e $\alpha$-decay - 27.90.+b 220 $\leq$ A

Copyright Società Italiana di Fisica, Springer-Verlag 2000