Distribution of M1 transitions in Pb208

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

doi:10.1103/PhysRevLett.61.1710

Distribution of M1 transitions in Pb208

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

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Abstract

The distribution of M1 strength in Pb208 has been measured between 5.8 and 7.4 MeV with highly polarized tagged photons. 02(M1)=14.6-1.3+1.5 eV corresponding to B(M1)=(10.7-0.9+1.1)N2 was found, and can fully account for the much discussed "missing" M1 in Pb208. When the present result is combined with known 1+ transitions above neutron threshold, an M1 giant resonance emerges at 7.3 MeV, 1 MeV wide, with B(M1)15.6N2. Smaller 1+ resonances are also seen at both 5.85 and 6.24 MeV. The total M1 strength below 6.4 MeV amounts to B(M1)=(1.9-0.4+0.7)N2.

Original language	English (US)
Pages (from-to)	1710-1712
Number of pages	3
Journal	Physical Review Letters
Volume	61
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.61.1710
State	Published - Jan 1 1988
Externally published	Yes

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Physics and Astronomy(all)

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title = "Distribution of M1 transitions in Pb208",

abstract = "The distribution of M1 strength in Pb208 has been measured between 5.8 and 7.4 MeV with highly polarized tagged photons. 02(M1)=14.6-1.3+1.5 eV corresponding to B(M1)=(10.7-0.9+1.1)N2 was found, and can fully account for the much discussed {"}missing{"} M1 in Pb208. When the present result is combined with known 1+ transitions above neutron threshold, an M1 giant resonance emerges at 7.3 MeV, 1 MeV wide, with B(M1)15.6N2. Smaller 1+ resonances are also seen at both 5.85 and 6.24 MeV. The total M1 strength below 6.4 MeV amounts to B(M1)=(1.9-0.4+0.7)N2.",

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T1 - Distribution of M1 transitions in Pb208

AU - Laszewski, R. M.

AU - Alarcon, R.

AU - Dale, D. S.

AU - Hoblit, S. D.

PY - 1988/1/1

Y1 - 1988/1/1

N2 - The distribution of M1 strength in Pb208 has been measured between 5.8 and 7.4 MeV with highly polarized tagged photons. 02(M1)=14.6-1.3+1.5 eV corresponding to B(M1)=(10.7-0.9+1.1)N2 was found, and can fully account for the much discussed "missing" M1 in Pb208. When the present result is combined with known 1+ transitions above neutron threshold, an M1 giant resonance emerges at 7.3 MeV, 1 MeV wide, with B(M1)15.6N2. Smaller 1+ resonances are also seen at both 5.85 and 6.24 MeV. The total M1 strength below 6.4 MeV amounts to B(M1)=(1.9-0.4+0.7)N2.

AB - The distribution of M1 strength in Pb208 has been measured between 5.8 and 7.4 MeV with highly polarized tagged photons. 02(M1)=14.6-1.3+1.5 eV corresponding to B(M1)=(10.7-0.9+1.1)N2 was found, and can fully account for the much discussed "missing" M1 in Pb208. When the present result is combined with known 1+ transitions above neutron threshold, an M1 giant resonance emerges at 7.3 MeV, 1 MeV wide, with B(M1)15.6N2. Smaller 1+ resonances are also seen at both 5.85 and 6.24 MeV. The total M1 strength below 6.4 MeV amounts to B(M1)=(1.9-0.4+0.7)N2.

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Distribution of M1 transitions in Pb208

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