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1. Measuring the Neutron Lifetime with Magnetically Trapped Ultracold Neutrons
Published: 12/16/2013
Author: Hans P Mumm
Abstract: We describe an experiment to measure the neutron lifetime using a technique with a set of systematic uncertainties largely different than those of previous measurements. In this approach, UCN are produced by inelastic scattering of cold (0.89 nm) ne ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914531

2. A New Limit on Time-Reversal Violation in Beta Decay
Published: 9/2/2012
Authors: Hans P Mumm, T E. Chupp, K P Coulter, R L Cooper, S J Freedman, B. K. Fujikawa, A. Garcia, G L. Jones, Jeffrey S Nico, Alan K Thompson, C A Trull, J. F. Wilkerson, F. E Wiefeldt
Abstract: We report the results of an improved determination of the triple correlation DP , (p_e × p_v) that can be used to limit possible time-reversal invariance in the beta decay of polarized neutrons and constrain extensions to the Standard Model. Our resu ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908635

3. A gamma and X-ray dector for cryogenic, high magnetic field applications
Published: 7/13/2012
Authors: Thomas R Gentile, R L Cooper, R. Alarcon, M J Bales, E J Beise, H Breuer, J. Byrne, T E. Chupp, Kevin J Coakley, Maynard S Dewey, Changbo Fu, Hans P Mumm, Jeffrey S Nico, Brian O'Neill, K. Pulliam, Alan K Thompson, F E. Wietfeldt
Abstract: As part of an experiment to measure the spectrum of photons emitted in beta-decay of the free neu- tron, we developed and operated a detector consisting of 12 bismuth germanate (BGO) crystals coupled to avalanche photodiodes (APDs). The detector wa ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911584

4. An Upper Bound on Parity Violating Neutron Spin Rotation in He-4
Published: 1/31/2011
Authors: Jeffrey S Nico, W M. Snow, Christopher D. Bass, Tiffany D. Bass, B. E. Crawford, K. F. Gan, B R Heckel, D Lou, D M Markoff, A M. Micherdzinska, Hans P Mumm, A. K. Opper, M Sarsour, E I Sharapov, H E Swanson, S. C Walbridge, V Zhumabekova
Abstract: We report an upper bound on parity violating neutron spin rotation in He-4. This experiment is the most sensitive search for neutron weak optical activity yet performed. Our result for the neutron spin rotation angle per unit length in He-4 is dphi/ ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906487

5. An experiment for the precision measurement of the radiative decay mode of the neutron
Published: 10/5/2009
Authors: R Cooper, Christopher D. Bass, E Beise, H Breuer, J Byrne, T E. Chupp, Kevin J Coakley, Maynard S Dewey, B Fisher, Changbo Fu, Thomas R Gentile, M. McGonagle, Hans P Mumm, Jeffrey S Nico, Alan K Thompson, F E. Wietfeldt
Abstract: The neutron typically beta decays into a proton, electron, and antineutrino. In some decays, it can be accompanied by a high energy photon. We recently performed the rst observation of the radiative beta decay branch for the free neutron with phot ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842579

6. Cryogenic Design and Performance of an Apparatus for Magnetically Trapping Ultracold Neutrons
Published: 10/5/2014
Author: Hans P Mumm
Abstract: The cryogenic design and performance of an apparatus used to magnetically confine ultracold neutrons (UCN) is presented. The apparatus is part of an effort to measure the beta-decay lifetime of the free neutron and is comprised of a high-current su ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917558

7. Experimental Parameters for a Reactor Antineutrino Experiment at Very Short Baselines
Published: 4/23/2013
Author: Hans P Mumm
Abstract: Reactor antineutrinos are used to study neutrino oscillation, search for signatures of non-standard neutrino interactions, and to monitor reactor operation for safeguard applications. The flux and energy spectrum of reactor antineutrinos can be predi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913270

8. Measurement of the Parity-Violating Neutron Spin Rotation in ^u4^He
Published: 1/1/2005
Authors: Christopher D. Bass, J M Dawkins, D Luo, A M. Micherdzinska, M Sarsour, W M. Snow, Hans P Mumm, Jeffrey S Nico, P R Huffman, D M Markoff, B R Heckel, H E Swanson
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=103002

9. New Limit on the {I}D{I} Coefficient in Polarized Neutron Decay
Published: 1/1/2000
Authors: L Lising, S R Hwang, J M Adams, T J Bowles, M C Browne, T E Chupp, K A Coulterpark, Maynard S Dewey, S J Freedman, B K Fujikawa, A Garcia, G L Greene, G L Jones, Hans P Mumm, Jeffrey S Nico, J M Richardson, R G Robertson, W A Teasdale, Alan K Thompson, E G Wasserman, Fred Eberhardt Wietfeldt, R C Welsh, J F Wilkerson
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=103223

10. Observation of the Radiative Decay Mode of the Free Neutron
Published: 1/1/2006
Authors: Jeffrey S Nico, Maynard S Dewey, Thomas R Gentile, Hans P Mumm, Alan K Thompson, B M Fisher, I Kremsky, Fred Eberhardt Wietfeldt, T E Chupp, R L Cooper, E J Beise, K G Kiriluk, J Byrne, K Coakley
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=103274



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