Hexadecapole strength in the region of the low-energy octupole resonance

Journal Article · Sun Oct 01 04:00:00 EDT 1989 · Physical Review (Section) C: Nuclear Physics; (USA)

DOI:https://doi.org/10.1103/PhysRevC.40.1595· OSTI ID:5334229

Fujita, Y ^[1]; Fujiwara, M; Morinobu, S; Katayama, I; Yamazaki, T; Itahashi, T; Ikegami, H ^[2]; Hayakawa, S I ^[3]

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1. College of General Education, Osaka University, Toyonaka, Osaka 560, Japan (JP)
2. Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567, Japan
3. Ashikaga Institute of Technology, Ashikaga 326, Japan

The strength distributions of hexadecapole transitions have been measured for the closed-shell nuclei of {sup 48}Ca, {sup 50}Ti, {sup 52}Cr, {sup 54}Fe, {sup 58}Ni, {sup 90}Zr, and {sup 208}Pb by using ({ital p},{ital p}{prime}) reactions at {ital E}{sub {ital p}}=65 MeV. The peak-by-peak analysis revealed the distribution for the excitation energy up to around 10 MeV. In {sup 208}Pb, the strength is distributed into two groups. One is the well-known first 4{sup +} state which exhausts an energy-weighted sum-rule fraction of 8.4%. The other is a bump consisting of clustering {ital L}=4 states with a total fraction of 11.2%. The structure of the bump is much the same as those of low-energy octupole resonance, suggesting the existence of a resonance-like structure of hexadecapole strength. In an analysis using a cumulative sum of the strength, a bump of a similar kind is recognized in each nucleus examined. These bumps exhaust 3--11% of the {ital E}4 energy-weighted sum rule and the centroids are situated at {ital E}{sub {ital x}}=4--9 MeV.

• OSTI ID: 5334229
• Journal Information: Physical Review (Section) C: Nuclear Physics; (USA), Journal Name: Physical Review (Section) C: Nuclear Physics; (USA) Vol. 40:4; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
ANGULAR MOMENTUM
BARYON REACTIONS
CALCIUM 48
CALCIUM ISOTOPES
CHARGED-PARTICLE REACTIONS
CHROMIUM 52
CHROMIUM ISOTOPES
E3-TRANSITIONS
E4-TRANSITIONS
ELEMENTS
ENERGY LEVELS
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ENERGY-LEVEL TRANSITIONS
EQUATIONS
EVEN-EVEN NUCLEI
GIANT RESONANCE
HADRON REACTIONS
HEAVY NUCLEI
INELASTIC SCATTERING
INTERMEDIATE MASS NUCLEI
IRON
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LEAD 208
LEAD ISOTOPES
MATHEMATICAL MODELS
METALS
MEV RANGE
MEV RANGE 10-100
MULTIPOLE TRANSITIONS
NICKEL 58
NICKEL ISOTOPES
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
PARITY
PARTICLE PROPERTIES
PROTON REACTIONS
RADIOISOTOPES
RANDOM PHASE APPROXIMATION
RESONANCE
SCATTERING
SHELL MODELS
SPIN
STABLE ISOTOPES
SUM RULES
TITANIUM 50
TITANIUM ISOTOPES
TRANSITION ELEMENTS
ZIRCONIUM 90
ZIRCONIUM ISOTOPES