Corrections for positron annihilation in flight in nuclear spectrometry

Journal Article · Mon Jan 01 04:00:00 EST 1973 · Nucl. Instrum. Methods, v. 112, no. 3, pp. 501-505

DOI:https://doi.org/10.1016/0029-554X(73)90169-9· OSTI ID:4386661

Kantele, J; Valkonen, M

two-quanta annihilation in flight, the Fermi beta-decay theory, and theories of positron energy loss are used in calculations of total probabilities of annihilation in flight of positrons in continuous spectra. The results are given in a nomogram useful in correcting for positron annihilation in flight in various nuclear-spectrometry experiments. Confirmation of the theoretical basis employed was obtained by comparing total absolute probabilities for annihilation in flight of /sup 62/Cu positrons in Perspex, copper, cadmium and lead, using a new differential method. The agreement with the theory was found to be excellent. A method for obtaining correct'' positron energy spectra with scintillation or semiconductor detectors is proposed. (auth)

• Research Organization: Univ. of Jyvaeskylae, Finland
• Sponsoring Organization: USDOE
• NSA Number: NSA-29-007808
• OSTI ID: 4386661
• Journal Information: Nucl. Instrum. Methods, v. 112, no. 3, pp. 501-505, Journal Name: Nucl. Instrum. Methods, v. 112, no. 3, pp. 501-505; ISSN NUIMA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

*POSITRONS-- ENERGY SPECTRA
CORRECTIONS
GAMMA SPECTROSCOPY
N46130* --Instrumentation--Radiation Detection Instruments-- Nuclear Spectroscopic Instrumentation