Distribution of M1 transitions in /sup 208/Pb

Journal Article · Mon Oct 10 04:00:00 EDT 1988 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.61.1710· OSTI ID:7033366

Laszewski, R M; Alarcon, R; Dale, D S; Hoblit, S D

The distribution of M1 strength in /sup 208/Pb has been measured between 5.8 and 7.4 MeV with highly polarized tagged photons. ..sigma..GAMMA/sup 2//sub 0/(M/sup 1/)/GAMMA = 14.6 +- /sup +1.5//sub -1.3/ eV corresponding to ..sigma..B(M1up-arrow) = 10.7 +- /sup +1.1//sub -0.9/..mu../sup 2//sub N/ was found, and can fully account for the much discussed ''missing'' M1 in /sup 208/Pb. When the present result is combined with known 1/sup 1/ transitions above neutron threshold, an M1 giant resonance emerges at 7.3 MeV, 1 MeV wide, with ..sigma..B(M1up-arrow)approx. =15.6..mu../sup 2//sub N/. Smaller 1/sup +/ resonances are also seen in both 5.85 and 6.24 MeV. The total M1 strength below 6.4 MeV amounts to ..sigma..B(M) = (1.9/sup +0.7//sub -0.4/)..mu../sup 2//sub N/.

• Research Organization: University of Illinois at Urbana-Champaign, Nuclear Physics Laboratory Department of Physics, 23 Stadium Drive, Champaign, Illinois 61820
• OSTI ID: 7033366
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 61:15; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

651920* -- Nuclear Properties & Reactions
A=190-219
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ASYMMETRY
BEAMS
DATA
E1-TRANSITIONS
ELASTIC SCATTERING
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
GAMMA SPECTRA
HEAVY NUCLEI
INFORMATION
ISOTOPES
LEAD 208
LEAD 208 TARGET
LEAD ISOTOPES
M1-TRANSITIONS
MEV RANGE
MEV RANGE 01-10
MULTIPOLE TRANSITIONS
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
PHOTONUCLEAR REACTIONS
POLARIZED BEAMS
SCATTERING
SPECTRA
STABLE ISOTOPES
TARGETS