Large Longitudinal Spin Alignment of Excited Projectiles in Intermediate Energy Inelastic Scattering

Hoff, D. E.  M.; Charity, R. J.; Brown, K. W.; Pruitt, C. D.; Sobotka, L. G.; Webb, T. B.; Potel, G.; Roeder, B.; Saastamoinen, A.

doi:10.1103/PhysRevLett.119.232501

Title: Large Longitudinal Spin Alignment of Excited Projectiles in Intermediate Energy Inelastic Scattering

Abstract

Here, we study the sequential breakup of E/A = 24.0 MeV ⁷Li projectiles excited through inelastic interactions with C, Be, and Al target nuclei. For peripheral events that do not excite the target, we find very large spin alignment of the excited ⁷Li projectiles longitudinal to the beam axis. This spin alignment is independent of the target used, and we propose a simple alignment mechanism that arises from an angular-momentum-excitation-energy mismatch. This mechanism is independent of the potential used for scattering and should be present in many scattering experiments.

Authors:

Hoff, D. E. M. ^[1]; Charity, R. J. ^[1]; Brown, K. W. ^[2]; Pruitt, C. D. ^[1]; Sobotka, L. G. ^[1]; Webb, T. B. ^[1]; Potel, G. ^[3]; Roeder, B. ^[4]; Saastamoinen, A. ^[4]

Washington Univ., St. Louis, MO (United States)
Washington Univ., St. Louis, MO (United States); Michigan State Univ., East Lansing, MI (United States)
Michigan State Univ., East Lansing, MI (United States)
Texas A & M Univ., College Station, TX (United States)

Publication Date:: Fri Dec 08 00:00:00 EST 2017

Research Org.:: Michigan State Univ., East Lansing, MI (United States); Washington Univ., St. Louis, MO (United States); Texas A & M Univ., College Station, TX (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP)

OSTI Identifier:: 1606507

Alternate Identifier(s):: OSTI ID: 1411989

Grant/Contract Number:: SC0013617; FG02-87ER40316; FG02-93ER40773; FG02-87ER-40316; FG02-93ER-40773

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review Letters

Additional Journal Information:: Journal Volume: 119; Journal Issue: 23; Journal ID: ISSN 0031-9007

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; polarization phenomena; unstable nuclei induced nuclear reactions; cluster models; nuclear data analysis & compilation; spectrometers & spectroscopic techniques

Citation Formats


                    Hoff, D. E.  M., Charity, R. J., Brown, K. W., Pruitt, C. D., Sobotka, L. G., Webb, T. B., Potel, G., Roeder, B., and Saastamoinen, A. Large Longitudinal Spin Alignment of Excited Projectiles in Intermediate Energy Inelastic Scattering.  United States: N. p., 2017. 
Web.  doi:10.1103/PhysRevLett.119.232501.

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                    Hoff, D. E.  M., Charity, R. J., Brown, K. W., Pruitt, C. D., Sobotka, L. G., Webb, T. B., Potel, G., Roeder, B., & Saastamoinen, A. Large Longitudinal Spin Alignment of Excited Projectiles in Intermediate Energy Inelastic Scattering.  United States.  https://doi.org/10.1103/PhysRevLett.119.232501

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                    Hoff, D. E.  M., Charity, R. J., Brown, K. W., Pruitt, C. D., Sobotka, L. G., Webb, T. B., Potel, G., Roeder, B., and Saastamoinen, A. Fri .  
"Large Longitudinal Spin Alignment of Excited Projectiles in Intermediate Energy Inelastic Scattering".  United States.  https://doi.org/10.1103/PhysRevLett.119.232501.  https://www.osti.gov/servlets/purl/1606507.

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@article{osti_1606507,

  title        = {Large Longitudinal Spin Alignment of Excited Projectiles in Intermediate Energy Inelastic Scattering},

  author       = {Hoff, D. E.  M. and Charity, R. J. and Brown, K. W. and Pruitt, C. D. and Sobotka, L. G. and Webb, T. B. and Potel, G. and Roeder, B. and Saastamoinen, A.},

  abstractNote = {Here, we study the sequential breakup of E/A = 24.0 MeV 7Li projectiles excited through inelastic interactions with C, Be, and Al target nuclei. For peripheral events that do not excite the target, we find very large spin alignment of the excited 7Li projectiles longitudinal to the beam axis. This spin alignment is independent of the target used, and we propose a simple alignment mechanism that arises from an angular-momentum-excitation-energy mismatch. This mechanism is independent of the potential used for scattering and should be present in many scattering experiments.},

  doi          = {10.1103/PhysRevLett.119.232501},

  journal      = {Physical Review Letters},

  number       = 23,

  volume       = 119,

  place        = {United States},

  year         = {Fri Dec 08 00:00:00 EST 2017},

  month        = {Fri Dec 08 00:00:00 EST 2017}

}

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Title: Large Longitudinal Spin Alignment of Excited Projectiles in Intermediate Energy Inelastic Scattering

Abstract

Citation Formats

Intermediate energy Coulomb excitation as a probe of nuclear structure at radioactive beam facilities journal, October 2003

Coulomb and nuclear effects in direct breakup of 54-MeV Li 7 + 12 C, Au 197 journal, June 1992

Polarization in Heavy Ion Reactions journal, December 1981

Coupled reaction channels calculations in nuclear physics journal, April 1988

g factors of the first 2 + states in the transitional 9 2 , 9 4 , 9 6 , 9 8 , 1 0 0 Mo isotopes and the onset of collectivity journal, February 2001

Compilation of phenomenological optical-model parameters 1954–1975 journal, January 1976

Spin alignment of excited projectiles due to target spin-flip interactions journal, February 2015

Q- and Z-dependence of angular momentum transfer in deeply inelastic collisions of 86Kr with 209Bi journal, June 1979

First observation of the Coulomb-excited double giant dipole resonance in Pb 208 via double-γ decay journal, February 1993

Relation between intrinsic parities and polarizations in collision and decay processes journal, February 1959

Rise and Fall of the Spin Alignment in Deep-Inelastic Reactions journal, September 1980

Angular momentum transfer and partition in the deep-inelastic reaction 664 MeV 84Kr + natAg journal, December 1981

Intrinsic fragment spins generated in the reactions of 20Ne with 197Au and 238U at 12.6 MeV/nucleon journal, November 1982

Nuclear shapes from alpha – gamma-ray angular correlations journal, January 1987

Electromagnetic processes in relativistic heavy ion collisions journal, June 1988

Spin alignment of43Sc produced in the fragmentation of 500 MeV/u46Ti journal, September 1994

Proton spin flip and substate excitation in inelastic scattering journal, March 1964

Sequential fission angular distributions from mass-asymmetric heavy-ion reactions journal, January 1985

Kinematical effects in heavy-ion reactions journal, June 1972

Single and correlated spin alignments for resonances in Mg 24 + Mg 24 inelastic scattering journal, March 1987

Anomalous magnetic moment of C 9 and shell quenching in exotic nuclei journal, July 2004

Spin-alignment and g-factor measurement of the $I^{\pi}$ = 12+ isomer in 192Pb produced in the relativistic-energy fragmentation of a 238U beam journal, July 2010

Spin alignment and polarisation in the (16O,15N) transfer reactions journal, June 1979

Proton polarizing system with Ar-ion laser for -RI scattering experiments journal, September 2005

Production of spin-controlled rare isotope beams journal, October 2012

Electron spin echoes of a photoexcited triplet: Pentacene in p ‐terphenyl crystals journal, October 1981

Alpha-Particle Angular Distributions with Respect to Spin Direction journal, December 1982

Deformation effects in the compound nucleus decay using the spin-alignment method journal, May 1990

Magnitude and alignment of transferred angular momentum in both quasi and deeply inelastic scattering journal, September 1979

Intermediate energy Coulomb excitation as a probe of nuclear structure at radioactive beam facilities
journal, October 2003

Coulomb and nuclear effects in direct breakup of 54-MeV ${}^{7}{Li}$ $+^{12}$ C, ${}^{197}{Au}$
journal, June 1992

Polarization in Heavy Ion Reactions
journal, December 1981

Coupled reaction channels calculations in nuclear physics
journal, April 1988

$g$ factors of the first $2^{+}$ states in the transitional $^{92, 94, 96, 98, 100} Mo$ isotopes and the onset of collectivity
journal, February 2001

Compilation of phenomenological optical-model parameters 1954–1975
journal, January 1976

Spin alignment of excited projectiles due to target spin-flip interactions
journal, February 2015

Q- and Z-dependence of angular momentum transfer in deeply inelastic collisions of 86Kr with 209Bi
journal, June 1979

First observation of the Coulomb-excited double giant dipole resonance in ${}^{208}{Pb}$ via double-γ decay
journal, February 1993

Relation between intrinsic parities and polarizations in collision and decay processes
journal, February 1959

Rise and Fall of the Spin Alignment in Deep-Inelastic Reactions
journal, September 1980

Angular momentum transfer and partition in the deep-inelastic reaction 664 MeV 84Kr + natAg
journal, December 1981

Intrinsic fragment spins generated in the reactions of 20Ne with 197Au and 238U at 12.6 MeV/nucleon
journal, November 1982

Nuclear shapes from alpha – gamma-ray angular correlations
journal, January 1987

Electromagnetic processes in relativistic heavy ion collisions
journal, June 1988

Spin alignment of43Sc produced in the fragmentation of 500 MeV/u46Ti
journal, September 1994

Proton spin flip and substate excitation in inelastic scattering
journal, March 1964

Sequential fission angular distributions from mass-asymmetric heavy-ion reactions
journal, January 1985

Kinematical effects in heavy-ion reactions
journal, June 1972

Single and correlated spin alignments for resonances in ${}^{24}{Mg}$ + ${}^{24}{Mg}$ inelastic scattering
journal, March 1987

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journal, July 2004

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