Answer to the comment

NUCLEAR

INSTRUMENTS

AND

METHODS

~14 (1974) 123;

©

NORTH-HOLLAND

PUBLISHING

CO.

A N S W E R TO T H E C O M M E N T J. BARTOgEK and J. M A g E K

Geophysics, Brno, Czechoslovakia Received 16 July 1973

Any delay of the analog pulse between the PUR input and the ADC input has no influence on the proper dead time correction. The dead time period must start at the moment of acceptance of the pulse by PUR and must stop at the moment of the end of the

123

ADC dead time period. The method proposed by Rolle cannot eliminate the remaining systematic error of 1.4% mentioned in the original paper.