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Determination of the fine-structure constant {alpha} by measuring the quotient of the Planck constant and the neutron mass

Abstract

Using a special high-precision apparatus at ILL the quotient h/m{sub n} (h Planck constant, m{sub n} neutron mass) has been measured. The value measured for h/m{sub n} leads to {alpha}{sup -1} = 137.03601082(524) (relative uncertainty: 3.9{center_dot}10{sup -8}) It was the first time that this fundamental constant has been determined by means of neutrons. The experiment, which had been running since 1981 in a preliminary version and since 1987 in the final version, which was finished in December 1996, is described. (author).
Authors:
Krueger, E; Nistler, W; Weirauch, W [1] 
  1. Physikalisch-Technische Bundesanstalt, Braunschweig (Germany)
Publication Date:
Apr 01, 1997
Product Type:
Technical Report
Report Number:
ILL-RA-1996
Reference Number:
SCA: 662410; PA: AIX-29:017475; EDB-98:056090; SN: 98001951572
Resource Relation:
Other Information: DN: 1 ref.; PBD: Apr 1997; Related Information: Is Part Of Annual Report 96; PB: [121] p.
Subject:
66 PHYSICS; FINE STRUCTURE; MASS; MEASURING METHODS; NEUTRONS; PARTICLE PROPERTIES; SOMMERFELD CONSTANT
OSTI ID:
593260
Research Organizations:
Institut Max von Laue - Paul Langevin (ILL), 38 - Grenoble (France).
Country of Origin:
France
Language:
English
Other Identifying Numbers:
Other: ON: DE98617526; TRN: FR9704858017475
Availability:
INIS; OSTI as DE98617526
Submitting Site:
FRN
Size:
pp. 52-53
Announcement Date:

Citation Formats

Krueger, E, Nistler, W, and Weirauch, W. Determination of the fine-structure constant {alpha} by measuring the quotient of the Planck constant and the neutron mass. France: N. p., 1997. Web.
Krueger, E, Nistler, W, & Weirauch, W. Determination of the fine-structure constant {alpha} by measuring the quotient of the Planck constant and the neutron mass. France.
Krueger, E, Nistler, W, and Weirauch, W. 1997. "Determination of the fine-structure constant {alpha} by measuring the quotient of the Planck constant and the neutron mass." France.
@misc{etde_593260,
title = {Determination of the fine-structure constant {alpha} by measuring the quotient of the Planck constant and the neutron mass}
author = {Krueger, E, Nistler, W, and Weirauch, W}
abstractNote = {Using a special high-precision apparatus at ILL the quotient h/m{sub n} (h Planck constant, m{sub n} neutron mass) has been measured. The value measured for h/m{sub n} leads to {alpha}{sup -1} = 137.03601082(524) (relative uncertainty: 3.9{center_dot}10{sup -8}) It was the first time that this fundamental constant has been determined by means of neutrons. The experiment, which had been running since 1981 in a preliminary version and since 1987 in the final version, which was finished in December 1996, is described. (author).}
place = {France}
year = {1997}
month = {Apr}
}