Nobuaki Kawamura

Energy Spectra of Photoprotons from p 31 and Ca 40

Photoproton spectra from P31 and Ca40 irradiated by 19 and 20.5-Mev bremsstrahlung, respectively, were observed using nuclear emulsions and previous methods (K. Shoda, et al., J. Phys. Soc. Japan, 16: 1807(1961)). Results were compared with the statistical model using the Weisskopf level density (V. F. Wofeisskopf and J. M. Blatt, Theoretical Nuclear Physics (John Wiley and Sons), 311(1954)). Data are presented in graphical form.

Photoprotons from S 32

The energy spectrum of 24-Mev bremsstrahlung photoprotons from S32 was studied using nuclear emulsions. The target thickness was 11.1 mg/cm2, which determined mainly the resolution of the result (about 2.5% for proton energy of 9 Mev). The cross section of S32( gamma ,p)P31 was estimated from experiments on P/sup 31/(p, gamma )S32. Such comparisons were possible for C12, O16, Ne20, Mg24, Si28, and Ca40 for which (p, gamma ) were previously studied.

Photoprotons from 23Na, 31P, 32S, 40Ca, 55Mn and 56Fe

Energy and angular distributions of photoprotons from 23 Na, 31 P, 32 S, 40 Ca, 55 Mn and 56 Fe irradiated with bremsstrahlung have been measured using nuclear emulsions. The energy distributions indicate strong transitions to a few selected residual states. The angular distributions indicate that these states are hole states.