Excitation Functions for the Fission Isomers <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Pu</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>2</mn><mn>4</mn><mn>0</mn><mi>m</mi></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math> and <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Pu</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>2</mn><mn>3</mn><mn>9</mn><mi>m</mi></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math> from <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">U</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>238</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow><mo>(</mo><mrow><mmultiscripts><mrow><mi mathvariant="normal">He</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>4</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow><mo>,</mo><mi>x</mi><mi>n</mi><mo>)</mo></math> Reactions

M. N. Namboodiri; F. H. Ruddy; John M. Alexander

doi:10.1103/PhysRevC.7.1222

Excitation Functions for the Fission Isomers ${}^{240 m}{Pu}$ and ${}^{239 m}{Pu}$ from ${}^{238}U ({}^{4}{He}, x n)$ Reactions

M. N. Namboodiri, F. H. Ruddy, and John M. Alexander

Phys. Rev. C 7, 1222 – Published 1 March 1973

Abstract

Excitation functions have been measured for the fission isomers ${}^{240 m}{Pu}$ and ${}^{239 m}{Pu}$ produced in the reactions of ${}^{238}U$ with ${}^{4}{He}$ . A value of 2.4 ± 0.5 nsec was obtained for the half-life of ${}^{240 m}{Pu}$ . The high detection efficiency of thick targets and annular detector geometry has been used and refined. Upper limits of 0.3 and 0.6 μb have been obtained for the production of 29-nsec ${}^{240 m}{Pu}$ and 6.5-nsec ${}^{238 m}{Pu}$ , respectively.

Received 13 October 1972

DOI:https://doi.org/10.1103/PhysRevC.7.1222

Authors & Affiliations

M. N. Namboodiri^*, F. H. Ruddy^†, and John M. Alexander

Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11790

^*Present address: Cyclotron Institute, Texas A & M University, College Station, Texas.
^†Present address: Nuclear Radiation Center and Department of Chemistry, Washington State University, Pullman, Washington 99163.

References (Subscription Required)

Click to Expand

Issue

Vol. 7, Iss. 3 — March 1973

Reuse & Permissions

Access Options

Author publication services for translation and copyediting assistance advertisement

Physical Review C

covering nuclear physics