Scattering of Protons from Helium and Level Parameters in Li5

Philip D. Miller and G. C. Phillips
Phys. Rev. 112, 2043 – Published 15 December 1958; Erratum Phys. Rev. 115, 1778 (1959)
PDFExport Citation

Abstract

The scattering of protons from helium has been investigated experimentally from 2.0 to 5.5 Mev with the Rice Institute Van de Graaff accelerator and a differentially pumped, large-volume scattering chamber. Excitation curves reveal no new states in Li5 up to an excitation energy of 6.5 Mev. A phase-shift analysis has been made of the angular distributions at laboratory bombarding energies of 3.03, 3.51, 4.02, 4.50, and 5.00 Mev. The phase shifts derived from this experiment and from experiments at other laboratories, in the energy range 1 to 18 Mev, have been interpreted in terms of the dispersion theory, and level parameters have been extracted. The nuclear radius which best fits the P-wave phase shifts is 2.6×1013 cm. For the ground state, (Eres)lab=2.6 Mev, J=32, γp2=12×1013 Mev-cm, and θp2=0.40. For the first excited state, (Eres)lab=10.8 Mev, J=12, γp2=30×1013 Mev-cm, and θp2=1.0. The S-wave phase shift is moderately well fit by a hard-sphere interaction with a radius of 2.0×1013 cm. At the present time, the D-wave phase shifts are so inaccurately known, that very little interpretation is possible.

  • Received 29 August 1958

DOI:https://doi.org/10.1103/PhysRev.112.2043

©1958 American Physical Society

Erratum

Scattering of Protons from Helium and Level Parameters in Li5

Philip D. Miller and G. C. Phillips
Phys. Rev. 115, 1778 (1959)

Authors & Affiliations

Philip D. Miller* and G. C. Phillips

  • The Rice Institute, Houston, Texas

  • *Now with the Oak Ridge National Laboratory, Oak Ridge, Tennessee.

References (Subscription Required)

Click to Expand
Issue

Vol. 112, Iss. 6 — December 1958

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
×