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23 results on '"Rand, E.T."'

5. Design and construction of the DEAP-3600 dark matter detector

Author

Amaudruz, P.-A., Baldwin, M., Batygov, M., Beltran, B., Bina, C.E., Bishop, D., Bonatt, J., Boorman, G., Boulay, M.G., Broerman, B., Bromwich, T., Bueno, J.F., Burghardt, P.M., Butcher, A., Cai, B., Chan, S., Chen, M., Chouinard, R., Churchwell, S., Cleveland, B.T., Cranshaw, D., Dering, K., DiGioseffo, J., Dittmeier, S., Duncan, F.A., Dunford, M., Erlandson, A., Fatemighomi, N., Florian, S., Flower, A., Ford, R.J., Gagnon, R., Giampa, P., Golovko, V.V., Gorel, P., Gornea, R., Grace, E., Graham, K., Grant, D.R., Gulyev, E., Hall, A., Hallin, A.L., Hamstra, M., Harvey, P.J., Hearns, C., Jillings, C.J., Kamaev, O., Kemp, A., Kuźniak, M., Langrock, S., La Zia, F., Lehnert, B., Li, O., Lidgard, J.J., Liimatainen, P., Lim, C., Lindner, T., Linn, Y., Liu, S., Majewski, P., Mathew, R., McDonald, A.B., McElroy, T., McFarlane, K., McGinn, T., McLaughlin, J.B., Mead, S., Mehdiyev, R., Mielnichuk, C., Monroe, J., Muir, A., Nadeau, P., Nantais, C., Ng, C., Noble, A.J., O’Dwyer, E., Ohlmann, C., Olchanski, K., Olsen, K.S., Ouellet, C., Pasuthip, P., Peeters, S.J.M., Pollmann, T.R., Rand, E.T., Rau, W., Rethmeier, C., Retière, F., Seeburn, N., Shaw, B., Singhrao, K., Skensved, P., Smith, B., Smith, N.J.T., Sonley, T., Soukup, J., Stainforth, R., Stone, C., Strickland, V., Sur, B., Tang, J., Taylor, J., Veloce, L., Vázquez-Jáuregui, E., Walding, J., Ward, M., Westerdale, S., White, R., Woolsey, E., and Zielinski, J.

Published
2019
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6. The GRIFFIN facility for Decay-Spectroscopy studies at TRIUMF-ISAC

Author

Garnsworthy, A.B., Svensson, C.E., Bowry, M., Dunlop, R., MacLean, A.D., Olaizola, B., Smith, J.K., Ali, F.A., Andreoiu, C., Ash, J.E., Ashfield, W.H., Ball, G.C., Ballast, T., Bartlett, C., Beadle, Z., Bender, P.C., Bernier, N., Bhattacharjee, S.S., Bidaman, H., Bildstein, V., Bishop, D., Boubel, P., Braid, R., Brennan, D., Bruhn, T., Burbadge, C., Cheeseman, A., Chester, A., Churchman, R., Ciccone, S., Caballero-Folch, R., Cross, D.S., Cruz, S., Davids, B., Varela, A. Diaz, Dillmann, I., Dunlop, M.R., Evitts, L.J., Garcia, F.H., Garrett, P.E., Georges, S., Gillespie, S., Gudapati, R., Hackman, G., Hadinia, B., Hallam, S., Henderson, J., Ilyushkin, S.V., Jigmeddorj, B., Kilic, A.I., Kisliuk, D., Kokke, R., Kuhn, K., Krücken, R., Kuwabara, M., Laffoley, A.T., Lafleur, R., Leach, K.G., Leslie, J.R., Linn, Y., Lim, C., MacConnachie, E., Mathews, A.R., McGee, E., Measures, J., Miller, D., Mills, W.J., Moore, W., Morris, D., Morrison, L.N., Moukaddam, M., Natzke, C.R., Ortner, K., Padilla-Rodal, E., Paetkau, O., Park, J., Patel, H.P., Pearson, C.J., Peters, E., Peters, E.E., Pore, J.L., Radich, A.J., Rajabali, M.M., Rand, E.T., Raymond, K., Rizwan, U., Ruotsalainen, P., Saito, Y., Sarazin, F., Shaw, B., Smallcombe, J., Southall, D., Starosta, K., Ticu, M., Timakova, E., Turko, J., Umashankar, R., Unsworth, C., Wang, Z.M., Whitmore, K., Wong, S., Yates, S.W., Zganjar, E.F., and Zidar, T.

Published
2019
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8. In-beam internal conversion electron spectroscopy with the SPICE detector

Author

Moukaddam, M., Smallcombe, J., Evitts, L.J., Garnsworthy, A.B., Andreoiu, C., Ball, G.C., Berean-Dutcher, J., Bishop, D., Bolton, C., Caballero-Folch, R., Constable, M., Cross, D.S., Drake, T.E., Dunlop, R., Garrett, P.E., Georges, S., Hackman, G., Hallam, S., Henderson, J., Henderson, R., Krücken, R., Kurchaninov, L., Kurkjian, A., Olaizola, B., O’Sullivan, E., Lu, P., Park, J., Peters, E.E., Pore, J.L., Rand, E.T., Ruotsalainen, P., Smith, J.K., Southall, D., Spencer, M., Svensson, C.E., Wiens, M., Williams, M., Yates, S.W., and Zidar, T.

Published
2018
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10. High-Statistics β+/EC-Decay Study of 122Xe

Author

Jigmeddorj, B., Garrett, P.E., Andreoiu, C.A., Ball, G.C., Bruhn, T., Cross, D.S., Garnsworthy, A.B., Hadinia, B., Moukaddam, M., Park, J., Pore, J.L., Radich, A.J., Rajabali, M.M., Rand, E.T., Rizwan, U., Svensson, C.E., Voss, P., Wang, Z., Wood, J.L., and Yates, S.W.

Published
2017
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12. New Opportunities in Decay Spectroscopy with the GRIFFIN and DESCANT Arrays

Author

Bildstein, V., Andreoiu, C., Ball, G.C., Ballast, T., Bartlett, C., Bender, P.C., Bernier, N., Bianco, L., Bishop, D., Brennan, D., Bruhn, T., Cheeseman, A., Churchman, R., Ciccone, S., Davids, B., Demand, G., Dillmann, I., Garnsworthy, A.B., Garrett, P.E., Georges, S., Hackman, G., Hadinia, B., Kokke, R., Krücken, R., Linn, Y., Lim, C., Martin, J.-P., Miller, D., Mills, W.J., Morrison, L.N., Ohlmann, C.A., Park, J., Pearson, C.J., Pore, J.L., Rajabali, M.M., Rand, E.T., Rizwan, U., Sarazin, F., Shaw, B., Starosta, K., Svensson, C.E., Sumithrarachchi, C., Unsworth, C., Voss, P., Wang, Z.M., Williams, J., Wong, J., and Wong, S.

Published
2015
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14. The TIGRESS Integrated Plunger ancillary systems for electromagnetic transition rate studies at TRIUMF

Author

Voss, P., Henderson, R., Andreoiu, C., Ashley, R., Austin, R.A.E., Ball, G.C., Bender, P.C., Bey, A., Cheeseman, A., Chester, A., Cross, D.S., Drake, T.E., Garnsworthy, A.B., Hackman, G., Holland, R., Ketelhut, S., Kowalski, P., Krücken, R., Laffoley, A.T., Leach, K.G., Miller, D., Mills, W.J., Moukaddam, M., Pearson, C.J., Pore, J., Rand, E.T., Rajabali, M.M., Rizwan, U., Shoults, J., Starosta, K., Svensson, C.E., Tardiff, E., Unsworth, C., Van Wieren, K., Wang, Z.-M., and Williams, J.

Published
2014
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15. Investigation of excited 0+ states in 160Er populated via the (p, t) two-neutron transfer reaction

Author

Burbadge C., Garrett P.E., Ball G.C., Bildstein V., Diaz Varela A., Dunlop M.R., Dunlop R., Faesternann T., Hertenberger R., Jamieson D.S., Kisliuk D., Leach K.G., Loranger J., MacLean A.D., Radich A.J., Rand E.T., Svensson C.E., Triambak S., and Wirth H.-F.

Subjects
Physics, QC1-999
Abstract

Many efforts have been made in nuclear structure physics to interpret the nature of low-lying excited 0+ states in well-deformed rare-earth nuclei. However, one of the difficulties in resolving the nature of these states is that there is a paucity of data. In this work, excited 0+ states in the N = 92 nucleus 160Er were studied via the 162Er(p, t)160Er two-neutron transfer reaction, which is ideal for probing 0+ → 0+ transitions, at the Maier-Leibnitz-Laboratorium in Garching, Germany. Reaction products were momentum-analyzed with a Quadrupole-3-Dipole magnetic spectrograph. The 0+2 state was observed to be strongly populated with 18% of the ground state strength.

Published
2018
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16. Nuclear structure of 122Xe studied via high-statistics β+/EC-decay

Author

Jigmeddorj B., Garrett P.E., Andreoiu C., Ball G.C., Bruhn T., Cross D.S., Garnsworthy A.B., Hackman G., Hadinia B., Moukaddam M., Park J., Pore J.L., Radich A.J., Rajabali M.M., Rand E.T., Rizman U., Svensson C.E., Voss P., Wang Z.M., Wood J.L., and Yates S.W.

Subjects
Physics, QC1-999
Abstract

The nuclear structure of 122Xe has been investigated with measurements of the β+/EC decay of 122Cs with the 8 π γ-ray spectrometer at the TRIUMF-ISAC facility. The data collected have enabled the determination of relative B(E2) values of some low-energy transitions, and the in-band transitions of the excited 0+ bands have been observed. As a result, the 2+ rotational band members for the 0+2 and 0+3 states have been firmly identified.

Published
2016
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17. High-Statistics Study of the β+/EC-Decay of 110In

Author

Varela A. Diaz, Garrett P.E., Ball G.C., Banjay J.C., Cross D.S., Demand G.A., Finlay P., Garnsworthy A.B., Green K.L., Hackman G., Kulp W.D., Leach K.G., Orce J.N., Phillips A.A., Rand E.T., Svensson C.E., Sumithrarachchi C., Triambak S., Wong J., Wood J.L., and Yates S.W.

Subjects
Physics, QC1-999
Abstract

A study of the 110In β+/EC decay was performed at the TRIUMF Isotope Separator and Accelerator (ISAC) facility to probe the nuclear structure of 110Cd. The data were collected in scaled-down γ-ray singles, γ − γ coincidence, and γ-electron coincidence mode. The data were sorted and a random-background subtracted γ − γ matrix was created containing a total of 850 million events. We expanded the level scheme of 110Cd significantly by identifying 75 levels under 3.8 MeV, including 12 new ones, and increased the number of previously observed transitions from these levels to 273. The γ-ray branching intensities have been extracted through an analysis of the coincidence intensities. The branching ratios were combined with a reanalysis of lifetimes measurements obtained in an (n, n'γ) reaction with monoenergetic neutrons for the calculation of B(E2) values and these results have lead to the proposal of a γ-soft rotor, or O(6) nucleus, rather than a vibrational, or U(5) pattern for the nature of the low-lying, low-spin levels in 110Cd.

Published
2014
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18. Reorientation-effect measurement of the first 2+ state in 12C: Confirmation of oblate deformation

Author

Kumar Raju, M., Orce, J.N., Navrátil, P., Ball, G.C., Drake, T.E., Triambak, S., Hackman, G., Pearson, C.J., Abrahams, K.J., Akakpo, E.H., Al Falou, H., Churchman, R., Cross, D.S., Djongolov, M.K., Erasmus, N., Finlay, P., Garnsworthy, A.B., Garrett, P.E., Jenkins, D.G., Kshetri, R., Leach, K.G., Masango, S., Mavela, D.L., Mehl, C.V., Mokgolobotho, M.J., Ngwetsheni, C., O'Neill, G.G., Rand, E.T., Sjue, S.K.L., Sumithrarachchi, C.S., Svensson, C.E., Tardiff, E.R., Williams, S.J., and Wong, J.

Published
2018
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19. Reorientation-effect measurement of the first 2 State in C: Confirmation of oblate deformation

Author

Kumar Raju, M., Orce, J.N., Navrátil, P., Ball, G.C., Drake, T.E., Triambak, S., Hackman, G., Pearson, C.J., Abrahams, K.J., Akakpo, E.H., Al Falou, H., Churchman, R., Cross, D.S., Djongolov, M.K., Erasmus, N., Finlay, P., Garnsworthy, A.B., Garrett, P.E., Jenkins, D.G., Kshetri, R., Leach, K.G., Masango, S., Mavela, D.L., Mehl, C.V., Mokgolobotho, M.J., Ngwetsheni, C., O'Neill, G.G., Rand, E.T., Sjue, S.K.L., Sumithrarachchi, C.S., Svensson, C.E., Tardiff, E.R., Williams, S.J., and Wong, J.

Abstract

A Coulomb-excitation reorientation-effect measurement using the TIGRESS γ−ray spectrometer at the TRIUMF/ISAC II facility has permitted the determination of the 〈21+‖E2ˆ‖21+〉 diagonal matrix element in $^{12}$C from particle−γ coincidence data and state-of-the-art no-core shell model calculations of the nuclear polarizability. The nuclear polarizability for the ground and first-excited (21+) states in $^{12}$C have been calculated using chiral NN N$^{4}$LO500 and NN+3NF350 interactions, which show convergence and agreement with photo-absorption cross-section data. Predictions show a change in the nuclear polarizability with a substantial increase between the ground state and first excited 21+ state at 4.439 MeV. The polarizability of the 21+ state is introduced into the current and previous Coulomb-excitation reorientation-effect analyses of $^{12}$C. Spectroscopic quadrupole moments of QS(21+)=+0.053(44) eb and QS(21+)=+0.08(3) eb are determined, respectively, yielding a weighted average of QS(21+)=+0.071(25) eb, in agreement with recent ab initio calculations. The present measurement confirms that the 21+ state of $^{12}$C is oblate and emphasizes the important role played by the nuclear polarizability in Coulomb-excitation studies of light nuclei.

Published
2017

20. Nuclear force imprints revealed on the elastic scattering of protons with $^{10}$C

Author

Kumar, A., Kanungo, R., Calci, A., Navrátil, P., Sanetullaev, A., Alcorta, M., Bildstein, V., Christian, G., Davids, B., Dohet-Eraly, J., Fallis, J., Gallant, A.T., Hackman, G., Hadinia, B., Hupin, G., Ishimoto, S., Krücken, R., Laffoley, A.T., Lighthall, J., Miller, D., Quaglioni, S., Randhawa, J.S., Rand, E.T., Rojas, A., Roth, R., Shotter, A., Tanaka, J., Tanihata, I., Unsworth, C., Institut de Physique Nucléaire d'Orsay ( IPNO ), Université Paris-Sud - Paris 11 ( UP11 ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), Direction des Applications Militaires ( DAM ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
Nuclear Theory, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], energy loss, elastic scattering, FOS: Physical sciences, interaction, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], nuclear reaction, Nuclear Theory (nucl-th), differential cross section: measured, excited nucleus, resonance: energy, quantum chromodynamics, 21.30.-x, angular distribution, effective field theory: chiral, Nuclear Experiment (nucl-ex), [ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, numerical calculations, [ PHYS.NUCL ] Physics [physics]/Nuclear Theory [nucl-th], 24.10.-i, hydrogen: target, Weinberg, 21.60.De, carbon, nuclear force, nucleus, parametrization, 25.60.Bx, 0.004 GeV-cms, 21.45.Ff, p nucleus, 29.39.Gj
Abstract

How does nature hold together protons and neutrons to form the wide variety of complex nuclei in the universe? Describing many-nucleon systems from the fundamental theory of quantum chromodynamics has been the greatest challenge in answering this question. The chiral effective field theory description of the nuclear force now makes this possible but requires certain parameters that are not uniquely determined. Defining the nuclear force needs identification of observables sensitive to the different parametrizations. From a measurement of proton elastic scattering on $^{10}$C at TRIUMF and ab initio nuclear reaction calculations we show that the shape and magnitude of the measured differential cross section is strongly sensitive to the nuclear force prescription., Comment: 7 pages, 6 figures

Published
2017

21. High-Precision Half-Life Measurements for the Superallowed Fermi $\beta$+ Emitters $^{14}$O and $^{18}$Ne

Author

Laffoley, A.T., Andreoiu, C., Austin, R.A.E., Ball, G.C., Bender, P.C., Bildstein, V., Blank, Bertram, Bouzomita, H., Cross, D.S., Deng, G., Diaz Varela, A., Dunlop, M.R., Dunlop, R., Finlay, P., Garnsworthy, A.B., Garrett, P., Giovinazzo, J., Grinyer, G.F., Hackman, G., Hadinia, B., Jamieson, D.S., Jigmeddorj, B., Ketelhut, S., Leach, K.G., Leslie, J.R., Mills, B., Moukaddam, M., Radich, A.J., Rajabali, M.M., Rand, E.T., Svensson, C.E., Tardiff, E., Thomas, J.C., Voss, P., Unsworth, C., Lion, Michel, Noyaux exotiques (NEX), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
2014

22. Improved half-life determination and β-delayed γ -ray spectroscopy for 18Ne decay

Author

Grinyer, G.F., Ball, G.C., Bouzomita, H., Ettenauer, S., Finlay, P., Garnsworthy, A.B., Garrett, P.E., Green, K.L., Hackman, G., Leslie, J.R., Pearson, C.J., Rand, E.T., Sumithrarachchi, C.S., Svensson, C.E., Thomas, J.C., Triambak, S., Williams, S.J., Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 21.10.Tg, 23.40.Bw, 24.80.+y, 27.20.+n
Abstract

The experiment was performed at the TRIUMF-ISAC radioactive ion-beam facility; The half-life of the superallowed Fermi β + emitter 18Ne has been determined to ±0.07% precision by counting 1042 keV delayed γ rays that follow approximately 8% of all β decays. The deduced half-life, T1/2 = 1.6648 (11) s, includes a 0.7%correction that accounts for systematic losses associated with rate-dependent detector pulse pileup that was determined using a recently developed γ -ray photopeak-counting technique. This result is a factor of two times more precise than, and in excellent agreement with, a previous lower-statistics measurement that employed the same experimental setup. High-resolution β-delayed γ -ray spectroscopy results for the relative γ -ray intensities and β-decay branching ratios to excited states in the daughter 18F are also presented.

Published
2013

23. High-precision branching-ratio measurement for the superallowed β+ emitter $^{26}$Al$^{m}$

Author

Finlay, P., Ball, G.C., Leslie, J.R., Svensson, C.E., Andreoiu, C., Austin, R.A.E., Bandyopadhyay, D., Cross, D.S., Demand, G., Djongolov, M., Ettenauer, S., Garrett, P.E., Green, K.L., Grinyer, G.F., Hackman, G., Leach, K.G., Pearson, C.J., Phillips, A.A., Rand, E.T., Sumithrarachchi, C.S., Triambak, S., Williams, S.J., Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
23.20.Lv, 23.40.−s, 24.80.+y, 27.30.+t, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

A high-precision branching-ratio measurement for the superallowed β + emitter 26Alm was performed at the TRIUMF-ISAC radioactive ion beam facility. An upper limit of 12 ppm at 90% confidence level was found for the second forbidden β + decay of 26Alm to the 2+ 1 state at 1809 keV in 26Mg. An inclusive upper limit of 15 ppm at 90% confidence level was found when considering all possible nonanalog β + /EC decay branches of 26Alm, resulting in a superallowed branching ratio of 100.0000+0 −0.0015%.

Published
2012

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