## 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).

Krueger, E;
Nistler, W;
Weirauch, W

^{[1] }- Physikalisch-Technische Bundesanstalt, Braunschweig (Germany)

## 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}

}

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}

}