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Your search keyword '"Behling, R. S."' showing total 13 results
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13 results on '"Behling, R. S."'

1. Precision measurement of the $\beta$-asymmetry in spin-polarized $^{37}\mathrm{K}$ decay

Author

Fenker, B., Gorelov, A., Melconian, D., Behr, J. A., Anholm, M., Ashery, D., Behling, R. S., Cohen, I., Craiciu, I., Gwinner, G., McNeil, J., Mehlman, M., Olchanski, K., Shidling, P. D., Smale, S., and Warner, C. L.

Subjects
Nuclear Experiment
Abstract

Using TRIUMF's neutral atom trap, TRINAT, for nuclear $\beta$ decay, we have measured the $\beta$ asymmetry with respect to the initial nuclear spin in $^{37}\mathrm{K}$ to be $A_\beta=-0.5707(13)_\mathrm{syst}(13)_\mathrm{stat}(5)_\mathrm{pol}$, a 0.3% measurement. This is the best relative accuracy of any $\beta$-asymmetry measurement in a nucleus or the neutron, and is in agreement with the standard model prediction $-0.5706(7)$. We compare constraints on physics beyond the standard model with other $\beta$-decay measurements, and improve the value of $V_\mathrm{ud}$ measured in this mirror nucleus by a factor of 4.

Published
2017
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2. Progress towards precision measurements of beta-decay correlation parameters using atom and ion traps

Author

Melconian, D., Behling, R. S., Fenker, B., Mehlman, M., Shidling, P. D., Anholm, M., Ashery, D., Behr, J. A., Gorelov, A., Gwinner, G., Olchankski, K., and Smale, S.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

The correlations of the decay products following the beta decay of nuclei have a long history of providing a low-energy probe of the fundamental symmetries of our universe. Over half a century ago, the correlation of the electrons following the decay of polarized 60Co demonstrated that parity is not conserved in weak interactions. Today, the same basic idea continues to be applied to search for physics beyond the standard model: make precision measurements of correlation parameters and look for deviations compared to their standard model predictions. Efforts to measure these parameters to the 0.1% level utilizing atom and ion trapping techniques are described., Comment: 10 pages, 5 figures, presented at the X Latin American Symposium on Nuclear Physics and Applications, 1-6 December 2013, Montevideo, Uruguay

Published
2014

6. Precision Measurement of the β Asymmetry in Spin-Polarized K37 Decay

Author

Fenker, B., primary, Gorelov, A., additional, Melconian, D., additional, Behr, J. A., additional, Anholm, M., additional, Ashery, D., additional, Behling, R. S., additional, Cohen, I., additional, Craiciu, I., additional, Gwinner, G., additional, McNeil, J., additional, Mehlman, M., additional, Olchanski, K., additional, Shidling, P. D., additional, Smale, S., additional, and Warner, C. L., additional

Published
2018
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7. Precision measurement of the nuclear polarization in laser-cooled, optically pumped37K

Author

Fenker, B, primary, Behr, J A, additional, Melconian, D, additional, Anderson, R M A, additional, Anholm, M, additional, Ashery, D, additional, Behling, R S, additional, Cohen, I, additional, Craiciu, I, additional, Donohue, J M, additional, Farfan, C, additional, Friesen, D, additional, Gorelov, A, additional, McNeil, J, additional, Mehlman, M, additional, Norton, H, additional, Olchanski, K, additional, Smale, S, additional, Thériault, O, additional, Vantyghem, A N, additional, and Warner, C L, additional

Published
2016
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9. The β+ decay of 37K as a multi-faceted probe of fundamental physics.

Author

Melconian, D., Behling, R. S., Behr, J. A., Ashery, D., Gorelov, A., Jackson, K. P., Kong, T., Mehlman, M., Pearson, M. R., and Shidling, P.

Subjects
*NUCLEAR physics, *RADIOACTIVE decay, *NUCLEAR energy, *STANDARD model (Nuclear physics), *PARTICLES (Nuclear physics), *ANGULAR distribution (Nuclear physics), *NUCLEAR spin, *PHYSICAL measurements
Abstract

Precision β decay experiments represent an important and complimentary approach to high-energy searches for physics outside the 'Standard Model', our current understanding of fundamental particles and their interactions. The mirror decay of 37K provides an excellent probe with which to search for new physics. The ft value of this (as well as other T = 1/2 mirror transitions) can be used to provide a measurement of the value of the Vud element of the CKM mass-mixing matrix, complementing the value obtained from superallowed pure Fermi decays. In addition, the polarized angular distribution parameters are sensitive to a variety of possible new physics: the β and ν asymmetries can be used to search for right-handed currents in the charged weak interaction, and their energy-dependences are sensitive to second-class currents forbidden in the Standard Model. Time-reversal symmetry can also be tested by a precision measurement of the triple-vector correlation between the initial nuclear spin and the momenta of the leptons. An overview of the variety of physics that can be probed using laser-cooled 37K and the techniques used to perform the precision measurements is presented. [ABSTRACT FROM AUTHOR]

Published
2011
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10. TRINAT: measuring β-decay correlations with laser-trapped atoms.

Author

Behr, J. A., Gorelov, A., Jackson, K. P., Pearson, M. R., Anholm, M., Kong, T., Behling, R. S., Fenker, B., Melconian, D., Ashery, D., and Gwinner, G.

Subjects
BETA decay, ATOM trapping, SPIN-polarized currents, NEUTRONS, WEAK interactions (Nuclear physics), LASER cooling
Abstract

TRIUMF’s neutral atom trap for β decay (TRINAT) has been used to measure the most accurate β- ν correlation. Plans include improving that measurement, and also carrying out a full program of spin-polarized β decay correlation measurements complementary to the decay of the neutron [ABSTRACT FROM AUTHOR]

Published
2014
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11. High-precision half-life measurement of the ß+ decay of 21Na.

Author

Shidling, P. D., Behling, R. S., Fenker, B., Hardy, J. C., Iacob, V. E., Mehlman, M., Park, H. I., Roeder, B. T., and Melconian, D.

Subjects
*NEON isotopes, *NUCLEAR physics, *PARTICLE decays
Abstract

The β+ decay of 21Na to 21Ne is one of the four cases currently being used to determine the value of Vud from nuclear mirror (T=1/2) transitions. To date, published values for the half-life of 21Na have not been consistent with one another. We report here a new measurement of the half-life: 22.4615±0.0039(stat)±0.00010.0015(syst)s. This result increases the world average of the 21Na half-life by 0.0048 s and reduces the uncertainty by a factor of 1.5. [ABSTRACT FROM AUTHOR]

Published
2018
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12. Precision Measurement of the β Asymmetry in Spin-Polarized 37K Decay.

Author

Fenker, B., Gorelov, A., Melconian, D., Behr, J. A., Anholm, M., Ashery, D., Behling, R. S., Cohen, I., Craiciu, I., Gwinner, G., McNeil, J., Mehlman, M., Olchanski, K., Shidling, P. D., Smale, S., and Warner, C. L.

Subjects
*ASYMMETRY (Chemistry), *NUCLEAR spin, *PARTICLE decays
Abstract

Using Triumf's neutral atom trap, Trinat, for nuclear β decay, we have measured the β asymmetry with respect to the initial nuclear spin in 37K to be Aβ=-0.5707(13)syst(13)stat(5)pol, a 0.3% measurement. This is the best relative accuracy of any β-asymmetry measurement in a nucleus or the neutron, and is in agreement with the standard model prediction -0.5706(7). We compare constraints on physics beyond the standard model with other β-decay measurements, and improve the value of Vud measured in this mirror nucleus by a factor of 4. [ABSTRACT FROM AUTHOR]

Published
2018
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13. Precision Measurement of the β Asymmetry in Spin-Polarized ^{37}K Decay.

Author

Fenker B, Gorelov A, Melconian D, Behr JA, Anholm M, Ashery D, Behling RS, Cohen I, Craiciu I, Gwinner G, McNeil J, Mehlman M, Olchanski K, Shidling PD, Smale S, and Warner CL

Abstract

Using Triumf's neutral atom trap, Trinat, for nuclear β decay, we have measured the β asymmetry with respect to the initial nuclear spin in ^{37}K to be A_{β}=-0.5707(13)_{syst}(13)_{stat}(5)_{pol}, a 0.3% measurement. This is the best relative accuracy of any β-asymmetry measurement in a nucleus or the neutron, and is in agreement with the standard model prediction -0.5706(7). We compare constraints on physics beyond the standard model with other β-decay measurements, and improve the value of V_{ud} measured in this mirror nucleus by a factor of 4.

Published
2018
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