Eur. Phys. J. A (2005) 25: 279-280
https://doi.org/10.1140/epjad/i2005-06-105-2

ENAM 2004

Yield of low-lying high-spin states at optimal charge-particle reactions

Skobeltsyn Institute of Nuclear Physics, Moscow State University, 119992, Moscow, Russia

^* e-mail: tatchuv@anna19.npi.msu.su

Received: 30 October 2004
Accepted: 29 March 2005
Published online: 9 August 2005

Abstract

Isomeric cross-section ratios (ICSR) σ_g/σ_m for the ^{4, 6, 8}He-induced reactions of Sr isotopes giving rise to ^89mg Zr isomeric pair ( J ^π = 9/2⁺, T _1/2 ^(g) = 3.27 d; J ^π = 1/2^-, T _1/2 ^(m) = 4.18min) are calculated using a statistical model approach. ICSR of the reactions ⁸⁶Sr(α, n)^89mg Zr and ⁸⁷Sr(α, 2n)^89mg Zr measured by us earlier in the energy range E = 17-29MeV are used as a test. Calculations and analysis of ICSR of reactions produced by unstable projectiles are performed for the first time. The dependence of obtained values on the projectile neutron number is discussed.