Particle line shape after ?-ray emission in flight

Sugiyama, Y.; Tomita, Y.; Ikezoe, H.; Shikazono, Naoya

doi:10.1007/bf01415137

Cited by 8 publications

(8 citation statements)

References 11 publications

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“…It may be illustrative of the effectiveness of the measurement to examine the energy spectrum of c for different m substates, in a similar manner as demonstrated in [11,12]. Figure 1 shows examples of the expected c.m.…”

Section: Measurement Of Polarization Tensorsmentioning

confidence: 91%

“…The γ ray recoil method has been successfully applied to the measurements where the high momentum resolving capabilities of the magnetic spectrographs are utilized [4,[11][12][13]. In this paper, we demonstrate that the simultaneous measurement of energy and scattering angle of the ejectile with a position sensitive silicon detector (PSD) also facilitates an alternative experiment to measure the polarization tensors by the γ ray recoil method.…”

Section: Measurement Of Polarization Tensorsmentioning

confidence: 99%

“…Sugiyama et al [12] have pointed out that the t kq elements with q = 0 which still remain in the equations of Bohlen and von Oertzen can be eliminated by taking the z-axis along the direction of propagation in the center-of-mass (c.m.) frame.…”

Section: Measurement Of Polarization Tensorsmentioning

confidence: 99%

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Tensor polarization of 12C[2+ 1] in the 16O(13C,12C)17O reaction at 50 MeV

Ikeda

Nakamura

Mizuuchi

et al. 2000

EPJ A

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The 16 O( 13 C, 12 C) 17 O reaction at 50 MeV has been investigated using the kinematical coincidence method. Polarization tensors t20 and t40 of 12 C[2 + 1 ] for the quantization axis taken along the direction of propagation have been measured by analyzing the energy spectrum of 12 C[2 + 1 ], modulated by the effect of γ ray emission. The deduced t40 values significantly deviate from zero, contrary to the prediction of the distorted-wave Born approximation theory based on one-step p shell neutron stripping without spin-dependent interactions. The phenomenological spin-orbit interaction necessary to reproduce the magnitude of measured t40 is found to be much larger than the folding model prediction. It is shown that the experimental polarization tensors as well as the cross sections can be reproduced by introducing multi-step processes involving excitations in 12 C and 13 C without introducing spin-dependent interactions. PACS. 25.70.Hi Transfer reactions -24.70.+s Polarization phenomena in reactions -24.10.Eq Coupledchannel and distorted-wave models 492 N. Ikeda et al.: Tensor polarization of 12 C[2 + 1 ] in the 16 O( 13 C, 12 C) 17 O reaction at 50 MeV

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Section: Measurement Of Polarization Tensorsmentioning

confidence: 91%

Section: Measurement Of Polarization Tensorsmentioning

confidence: 99%

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Tensor polarization of 12C[2+ 1] in the 16O(13C,12C)17O reaction at 50 MeV

Ikeda

Nakamura

Mizuuchi

et al. 2000

EPJ A

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“…Wuosmaa et al obtained the single and correlated m-substate population parameters for 2+ (1.37 MeV) and 2+-2+ excitations in Mg+ Mg in the regions of two strong resonances seen in inelastic scattering through the p-ray angular correlation measurement [4,5]. The angular distribution for the m = 0 substate cross section measured in the beam-axis &arne showed prominent oscillations in The m-substate population has been extracted properly &om a line shape of excited reaction products which are broaden by p decay in Hight, when a quantization axis is taken along the center of mass scattering angle of the products [7,8]. The line shape reflects the p-ray angular distribution which has a characteristic pattern for a different magnetic substate.…”

mentioning

confidence: 99%

“…In the present work we measured the m-substate population by the p-ray recoil method [7,8] in order to assign spin values of resonances observed at E, -30 MeV in x2C+i60 inelastic scattering. The p-ray recoil method is available when a high-energy resolution is achieved for the particle spectrum.…”

mentioning

confidence: 99%

New approach to spin assignments of intermediate structures inC12(
Sugiyama
¹
,
Tomita
²
,
Ikezoe
³

et al. 1994
Phys. Rev. C
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0
0
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Magnetic substate populations for the 2+ state at 4.44 MeV in C were measured in resonant C+ 0 inelastic scattering by the p-ray recoil method. The m-substate population has been determined in the coordinate frame where a quantization axis is taken along the center of mass scattering angle of a reaction product. This coordinate frame gives an advantage that a resonance spin J can be obtained directly from m-substate angular distributions compared with the beam-axis frame. In addition a decay L value is sensitive to the relative intensity between each m-substate cross section. Our data suggest a spin assignment of J = 16+ or 17 for the structures at E, = 29.8 MeV and 31.8 MeV. Both structures are determined to decay dominantly through the aligned con6guration of L = J -2. PACS number(s): 25.70.Ef, 24.70.+s, 21.10.Hw Recent measurements of the magnetic substate populations in resonant inelastic scattering have provided us with important information for clarifying the reaction mechanism on the observed resonance behavior [1 -7].

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