Nuclear physics with polarized heavy ions

Fick, D.; Grawert, G.; Turkiewicz, I.M.

doi:10.1016/0370-1573(92)90053-3

Cited by 48 publications

(10 citation statements)

References 139 publications

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“…In particular, there is a strong demand to find an efficient scheme to polarize the nuclear spin of unstable species with a lifetime of milliseconds or even microseconds, which are of great interest in recent years and far more difficult to polarize than stable ones [1]. Among them, the muonium μ e − is one of the most difficult species to polarize due to its short lifetime (2.2 μs) before annihilation.…”

Section: Introductionmentioning

confidence: 99%

“…Spin-polarized species are very useful tools for investigating various kinds of interaction dynamics, not only in atomic physics, but also in nuclear physics [1] and high energy physics [2]. In particular, there is a strong demand to find an efficient scheme to polarize the nuclear spin of unstable species with a lifetime of milliseconds or even microseconds, which are of great interest in recent years and far more difficult to polarize than stable ones [1].…”

Section: Introductionmentioning

confidence: 99%

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Spin polarization of Doppler-broadened atoms by the broadband nanosecond and transform-limited picosecond laser pulses: case study for the muonium

Nakajima

2012

J. Opt. Soc. Am. B

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We study the spin polarization of Doppler-broadened atoms by broadband nanosecond (ns) pulses, and compare the polarization efficiency with that by the transform-limited picosecond (ps) pulses that have the same spectral bandwidth. Specific calculations are performed for the case of muonium with a set of density matrix equations and with rate equations using the uncoupled basis states. We find that the polarization efficiency with the broadband ns laser pulses is rather good, although it is not as good as that with the transform-limited ps pulses. Our results imply that, depending on the available laser system, we can use either broadband ns or transform-limited ps laser pulses to polarize almost any Doppler-broadened atoms.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Spin polarization of Doppler-broadened atoms by the broadband nanosecond and transform-limited picosecond laser pulses: case study for the muonium

Nakajima

2012

J. Opt. Soc. Am. B

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“…Notice that this effect would be important in fusion in astrophysical environments under a strong magnetic field, which leads to a natural polarization of colliding nuclei. Experimentally, fusion of an aligned light nucleus, 23 Na, has been measured [25][26][27]. For heavier deformed nuclei, a measurement of fusion cross sections for the 16 O+ 165 Ho system was planned [24], even though the actual experiment has not yet been performed so far [28].…”

Section: Introductionmentioning

confidence: 99%

Subbarrier fusion reactions of an aligned deformed nucleus

Hagino

Sakaguchi

2019

Phys. Rev. C

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We discuss heavy-ion fusion reactions of a well-deformed odd-mass nucleus at energies around the Coulomb barrier. To this end, we consider the 16 O+ 165 Ho reaction and take into account the effect of deformation of 165 Ho using the orientation average formula. We show that fusion cross sections are sensitive to magnetic substates of the target nucleus, and cross sections for the side collision, which are relevant to a synthesis of superheavy elements, may be enhanced by a factor of around two by aligning the deformed target nuclei. We also discuss the effect of alignment on the fusion barrier distribution. We find that, for a particular choice of alignment, the shape of barrier distribution becomes similar to a typical shape of barrier distribution for a deformed nucleus with a negative hexadecapole deformation parameter, β4, even if the intrinsic β4 is positive in the target nucleus.

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“…Spin-polarized radioactive isotope beams (RIBs) are of great interest in nuclear physics [1]. In particular, with the advances in laser technology, optical pumping is a very useful technique to efficiently polarize nuclear spin of unstable atoms/ions even when their lifetime is very short [2][3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Effective collinear optical pumping for nuclear spin polarization

et al. 2014

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By numerically solving the density matrix equations, we show that the laser frequency ramping method by means of position-dependent Zeeman splitting can efficiently polarize nuclear spin of atoms/ions in an accelerator beamline. This minimizes a quantum phenomenon, coherent population trapping, which limits the optical pumping efficiency in the polarized beamline for radioactive nuclear spin polarization. We consider the 8 Li atomic system interacting with two circularly polarized laser beams in the presence of time-dependent magnetic field. From numerical results, we find that optimum frequency ramping allows efficient optical pumping for a short interaction time, e.g., 2 μs.

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Nuclear physics with polarized heavy ions

Cited by 48 publications

References 139 publications

Spin polarization of Doppler-broadened atoms by the broadband nanosecond and transform-limited picosecond laser pulses: case study for the muonium

Spin polarization of Doppler-broadened atoms by the broadband nanosecond and transform-limited picosecond laser pulses: case study for the muonium

Subbarrier fusion reactions of an aligned deformed nucleus

Effective collinear optical pumping for nuclear spin polarization

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