Correlated Two-Photon Lines from 6-MeV/nucleon U+ Th, U+ U, and Th+ Th Collisions

authored by

K. Danzmann, W. E. Meyerhof, E. C. Montenegro, E. Dillard, H. P. Ḧlskötter, N. Guardala, D. W. Spooner, B. Kotlinski, D. Cline, A. Kavka, C. W. Beausang, J. Burde, M. A. Deleplanque, R. M. Diamond, R. J. McDonald, A. O. MacChiavelli, B. S. Rude, F. S. Stephens, J. D. Molitoris

Abstract

We find that narrow lines at 1043 and 1062 keV in the summed-energy, 180°-correlated two-photon spectrum from 6-MeV/nucleon U+Th collisions can be produced by cascades from high-spin states (32+) in U238. We see no evidence for narrow two-photon lines in U+Th, Th+Th, and U+U collisions corresponding to the electron-positron lines seen by others: In the summed-energy region between 1.2 and 2.0 MeV, we set an upper limit for the cross section of 6×10-31 cm2 averaged over a target thickness of 1 mg/cm2.

External Organisation(s)

Stanford University
University of Rochester
University of California at Berkeley
Lawrence Livermore National Laboratory

Type

Article

Journal

Physical review letters

Volume

62

Pages

2353-2356

No. of pages

4

ISSN

0031-9007

Publication date

15.05.1989

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

General Physics and Astronomy

Electronic version(s)

http://hdl.handle.net/11858/00-001M-0000-0013-5D2C-2 (Access: Open)
https://doi.org/10.1103/PhysRevLett.62.2353 (Access: Closed)