Excitation of the isovector giant dipole resonance by inelastic. alpha. scattering and the neutron skin of nuclei

Journal Article · Mon Mar 11 00:00:00 EST 1991 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.66.1287· OSTI ID:5834298

Krasznahorkay, A; Bacelar, J; Bordewijk, J A; Brandenburg, S; Buda, A; van't Hof, G; Hofstee, M A; Kato, S; Poelhekken, T D; van der Werf, S Y; van der Woude, A ^[1]; Harakeh, M N; Kalantar-Nayestanaki, N ^[2]

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1. Kernfysisch Versneller Instituut, 9747 AA Groningen (The Netherlands)
2. Faculteit Natuurkunde en sterrenkunde, de Boelelaan 1081, 1081 HV Amsterdam (The Netherlands)

The cross section of the isovector giant dipole resonance (GDR) excited by inelastic scattering of 120-MeV {alpha} particles for 0{degree}{le}{Theta}{alpha}{prime}{le}3{degree} has been measured using the {sup 116,124}Sn({alpha},{alpha}{prime}{gamma}{sub 0}) and {sup 208}Pb({alpha},{alpha}{prime}{gamma}{sub 0}) reactions. The results are compared with distorted-wave Born-approximation calculations with a GDR form factor depending on the relative difference of proton and neutron radii ({Delta}{ital R}{sub {ital p}{ital n}}/{ital R}{sub 0}). Within the model used, the {Delta}{ital R}{sub {ital p}{ital n}}/{ital R}{sub 0} values for {sup 116}Sn, {sup 124}Sn, and {sup 208}Pb deduced from the comparison of measured and calculated cross sections are (0.7{sub {minus}0.7}{sup +2.3})%, (4.1{sub {minus}2.5}{sup +2.1})%, and (3.0{plus minus}1.3)%, respectively.

• OSTI ID: 5834298
• Journal Information: Physical Review Letters; (USA), Vol. 66:10; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA REACTIONS
CROSS SECTIONS
HEAVY NUCLEI
GIANT RESONANCE
LEAD 208 TARGET
TIN 116 TARGET
TIN 124 TARGET
BORN APPROXIMATION
COINCIDENCE SPECTROMETRY
DISTORTED WAVE THEORY
EXPERIMENTAL DATA
GAMMA DETECTION
GROUND STATES
MEV RANGE 100-1000
CHARGED-PARTICLE REACTIONS
DATA
DETECTION
ENERGY LEVELS
ENERGY RANGE
INFORMATION
MEV RANGE
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
RADIATION DETECTION
RESONANCE
TARGETS
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