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Title: LIFETIMES OF THE FIRST EXCITED STATES OF F$sup 17$ AND O$sup 1$$sup 7$

Abstract

Using the gamma - gamma coincidence method and an electronic time-to- amplitude converter, the lifetimes of the first excited states in the mirror pair O/sup 17/(0.87 Mev) and F/sup 17/(0.50 Mev) were measured. The reactions initiating the gamma cascades were O/sup 16/(d,p)O/sup 17/ and direct proton capture in O/sup 16/. The time resolution of the coincidence circuit was good enough to allow the lifetime measurements to be made by direct observation of the exponential decay, rather than by measurement of the centroid shift. The measured mean life of O/sup 17/ is (2.55 plus or minus 0.13) x 10/sup -10/ sec; the measured mea n life of F/sup 17/ is (4.45 plus or minus 0.22) x 10/sup -10/ sec. Both of these re sults are in reasonable agreement with earlier, less accurate values. (auth)

Authors:
; ; ;
Publication Date:
Research Org.:
Brookhaven National Lab., Upton, N.Y.
OSTI Identifier:
4124312
NSA Number:
NSA-15-000948
Resource Type:
Journal Article
Journal Name:
Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D
Additional Journal Information:
Journal Volume: Vol: 120; Other Information: Orig. Receipt Date: 31-DEC-61
Country of Publication:
Country unknown/Code not available
Language:
English
Subject:
PHYSICS; COINCIDENCE METHODS; FLUORINE; LIFETIME; OXYGEN; PHOTONS; PROTONS

Citation Formats

Kane, J V, Pixley, R E, Schwartz, R B, and Schwarzschild, A. LIFETIMES OF THE FIRST EXCITED STATES OF F$sup 17$ AND O$sup 1$$sup 7$. Country unknown/Code not available: N. p., 1960. Web. doi:10.1103/PhysRev.120.162.
Kane, J V, Pixley, R E, Schwartz, R B, & Schwarzschild, A. LIFETIMES OF THE FIRST EXCITED STATES OF F$sup 17$ AND O$sup 1$$sup 7$. Country unknown/Code not available. https://doi.org/10.1103/PhysRev.120.162
Kane, J V, Pixley, R E, Schwartz, R B, and Schwarzschild, A. 1960. "LIFETIMES OF THE FIRST EXCITED STATES OF F$sup 17$ AND O$sup 1$$sup 7$". Country unknown/Code not available. https://doi.org/10.1103/PhysRev.120.162.
@article{osti_4124312,
title = {LIFETIMES OF THE FIRST EXCITED STATES OF F$sup 17$ AND O$sup 1$$sup 7$},
author = {Kane, J V and Pixley, R E and Schwartz, R B and Schwarzschild, A},
abstractNote = {Using the gamma - gamma coincidence method and an electronic time-to- amplitude converter, the lifetimes of the first excited states in the mirror pair O/sup 17/(0.87 Mev) and F/sup 17/(0.50 Mev) were measured. The reactions initiating the gamma cascades were O/sup 16/(d,p)O/sup 17/ and direct proton capture in O/sup 16/. The time resolution of the coincidence circuit was good enough to allow the lifetime measurements to be made by direct observation of the exponential decay, rather than by measurement of the centroid shift. The measured mean life of O/sup 17/ is (2.55 plus or minus 0.13) x 10/sup -10/ sec; the measured mea n life of F/sup 17/ is (4.45 plus or minus 0.22) x 10/sup -10/ sec. Both of these re sults are in reasonable agreement with earlier, less accurate values. (auth)},
doi = {10.1103/PhysRev.120.162},
url = {https://www.osti.gov/biblio/4124312}, journal = {Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D},
number = ,
volume = Vol: 120,
place = {Country unknown/Code not available},
year = {Sat Oct 01 00:00:00 EDT 1960},
month = {Sat Oct 01 00:00:00 EDT 1960}
}