CR-39 has been exposed to doses of 60Co gamma-rays in the range 500 Grays to 10,000 Grays (50 K Rad to 1 M Rad). Changes in bulk etch-rate were observed throughout this range, showing that CR-39 is more sensitive to gamma doses than other SSTR materials.

AbstractDie Kinetik der thermischen Zers. von U(BH4 )4 in der Gasphase gemäß Reaktionen A und Bwird IR‐absorptionsspektrometrisch in Abhängigkeit von der Temp. untersucht.

A quantitative study of the kinetics of the thermal decomposition of U(BH4)4 in the gas phase is described. The decomposition is monitored by changes in the infrared absorption spectrum at different temperatures. Decomposition is found to be of 1st order in the 130–170†C temperature range and of 2nd order in the 100–120°C temperature range. The reaction rate constants and activation energies are determined for each temperature region. It is shown that the shift from higher order to a lower order as the reaction temperature increases is consistent with the Lindemann theory.

AbstractU(BH4)4‐Dampf (0.08 Torr) wird durch UV‐Licht von 253.5 nm photolytisch zersetzt.

AbstractDie leicht flüchtige Titelverbindung wird in 2 Stufen entsprechend den Reaktionen A und Bdargestellt (Vorsicht! Al(BH4)3 ist eine explosive flüchtige Flüssigkeit).