NOTES ON A FAST TIME ANALYZER FOR SHORT LIFETIME MEASUREMENTS

Journal Article · Sat Oct 01 04:00:00 EDT 1960 · Nuclear Instr. & Methods

DOI:https://doi.org/10.1016/0029-554X(60)90044-6· OSTI ID:4080224

Bonitz, M; Berlovich, E J

A critical comparison of the single- and multichannel method for shont lifetime measurements of excited states in nuclei is given. A new time-to-height conventing system, based on the pulse overlap principle of a biased diode discriminator, was constructed. The time resolution of the prompt gamma - gamma coincidence curve from a Co/sup 60/ source is 5 x 10/sup -10/ sec. The influence of the energy of the coinciding particles on the performance of the time analyzer, and a stability control method are discussed. Experimental results are given for the following excited levels: 145 kev in Pr/sup 141/ T/sub 1/2/ = (2.0 approximately 0.2) x lO/sup -9/ sec; 279 kev i n Tl/sup 203/, T/sub 1/2/, = (2.9 approximately 0.2) x lO/sup -10/ sec, and 411 kev in Hg/sup 198/, T/ sub 1 / />i/sub 2/ = (3.5 approximately 0.8) x 10/sup -11/ sec. (auth)

• Research Organization: Inst. of Physics and Tech., Academy of Sciences, Leningrad
• NSA Number: NSA-15-006149
• OSTI ID: 4080224
• Journal Information: Nuclear Instr. & Methods, Journal Name: Nuclear Instr. & Methods Vol. Vol: 9
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

COBALT 60
CONTROL SYSTEMS
DIODES
ENERGY LEVELS
ENGINEERING AND EQUIPMENT
EXCITED STATES
GAGES
GAMMA SOURCES
HALF-LIFE
LEVELS
LIFETIME
MEASURED VALUES
MERCURY 198
NUCLEI
PERFORMANCE
PRASEODYMIUM 141
PULSE ANALYZERS
PULSES
STABILITY
THALLIUM 203
TIME-TO-PULSE HEIGHT CONVERTE