Scattering of 40-Mev Protons from He4

R. M. Eisberg
Phys. Rev. 102, 1104 – Published 15 May 1956
PDFExport Citation

Abstract

The existence of an excited state in He4 may be investigated by bombarding these nuclei with a mono-energetic beam of protons and looking for a group of inelastically scattered protons corresponding to excitation of the state. Using this technique at a bombarding energy of 32-Mev, Benveniste and Cork found no evidence of a state in He4 of excitation energy less than 23 Mev. The 40-Mev beam of the Minnesota proton linear accelerator has been used to extend the search for a state in He4 to higher excitation energies. A gas target was bombarded and particles emitted at forward angles were detected in a scintillation counter which measured their energy. By observing the energy loss in traversing thin foils, the masses of the emitted particles were determined. Elastically scattered protons and recoil He4 were seen, as well as deuterons and recoil He3 from the ground state (p, d) reaction. A continuum of protons from (p, 2p) and (p, pn) reactions was observed. No evidence was found for a group of inelastically scattered protons corresponding to excitation of a state in He4 of energy less than 28 Mev.

  • Received 9 February 1956

DOI:https://doi.org/10.1103/PhysRev.102.1104

©1956 American Physical Society

Authors & Affiliations

R. M. Eisberg*

  • Department of Physics, University of Minnesota, Minneapolis, Minnesota

  • *Present address: Cavendish Laboratory, Cambridge, England.

References (Subscription Required)

Click to Expand
Issue

Vol. 102, Iss. 4 — May 1956

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Journals Archive

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×