De-excitation of high spin isomers in the 191Pb isotope

✍ Scribed by J.M. Lagrange; M. Pautrat; J.S. Dionisio; Ch. Vieu; J. Vanhorenbeeck

• Book ID: 104337208
• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 389 KB
• Volume: 648
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(99)00017-2

✦ Synopsis

The 191pb isotope, produced through different A(b,xn)191pb reactions, where b stands for nuclei such as 160, 2°Ne, and 3tp, is studied. The half-life of some excited levels being greater than 10 ns, the recoil catcher method is suitable to look into the de-excitation 3' ray and conversion electron spectra of these states. The conversion coefficients are deduced and e--3' and 3'-3' coincidence measurements lead to the part of the level scheme de-exciting these isomers. This level scheme is compared to theoretical predictions obtained through a microscopic calculation in a three quasiparticle approximation, using a surface delta interaction with a reduced pairing component. The conclusions are very similar to those previously obtained for 193pb. (~) 1999 Elsevier Science B.V.