Further Radiochemical Studies of the High-Energy Fission Products

DISTRIBUTION OF NUCLEAR CHARGE IN THE PROTON-INDUCED FISSION OF Th232: PART II

“…For comparison, Fig. 3 gives similar data for ~~railiurn fissioil (7,29). The errors associated with the fractional yield data are due mainly to (a) uncertainty in the exact proton energy a t which the bombardments were inacle due to the radial distributioil of the proton beam and (b) energy losses in the target itself as calculated (9).…”

“…The paper by Pate, Foster, and Yaffe (5) summarizes those up to the beginning of 1958. Other papers of interest are those of Alexander and Coryell ( G ) and Stevenson et al (7), which give some later references. I t rapidly becomes apparent that one cannot use a single-charge distribution curve to fit all the data.…”

“…Generally, the disintegration rate Db(T,tl) of B a t time tl is A second separation of B from A a t the time t2 after the lirst separation will give B formed by decay from A only and will be given by 111 the experi~ne~lts with Ga7?, Ag112, and La1", the appropl-i,~te equations are [3] and [7]. Here, N, f , a,, and a, are unknown, the rest are experi~nentally deterniinable terms.…”

A treatment of medium-energy particle induced fission for spallation-systems’ calculations

“…(2). Taking a Fermi distribution (with B n , the effective neutron binding [31]. The upper mass edges fit a Gaussian distribution function of standard deviation 8 ± 0.9 amu on a mean of 134 ± 3 amu.…”

Nuclear charge distribution in the region of symmetric fission of 238U by protons of energy 20–85 MeV

“…The independent yield data shown in Table 4 were converted into fractional chain yields using the cumulative yield data shown in Table 6 and data reported by Baba, Umezawa and Baba (42), Miller (43), Hicks and Gilbert (41), Stevenson et al (44), and Lindner and Osborne (45). The fractional chain yield data shown in Table 7 were used to construct charge dispersion curves.…”