Nuclear Data Sheets for A=224

The experimental nuclear spectroscopic data for ten experimentally known nuclides of mass number 224 (Bi, Po, At, Rn, Fr, Ra, Ac, Th, Pa, U) have been evaluated and presented together with the Adopted properties for levels and. rays. For Bi-224, Po-224, At-224, Rn-224, Fr-224, Pa-224 and U-224 nuclei, only the ground-state information is known. Half-lives of ground states of Bi-224 and Po-224 have not yet been measured. The decay of Rn-224 to Fr-224 has been studied, but no decay scheme has been proposed. The decay of Ac-224 to Ra-224 is reported only in an abstract style conference proceedings. For a definite J pi assignment for ground state of Ac-224, a detailed study of this decay may be helpful. In the decay of Pa-228 to Ac-224, authors of 1994Ah03 state that the lowest state observed in their work may not be the ground state. Thus an extensive study of Pa-228 a decay, and studies involving nuclear reactions are warranted since the level scheme of Ac-224 presented in this evaluation is considered as incomplete due to the lack of confirmed information about multipolarities, mixing ratios and other spectroscopic details. Three new nuclides Bi-224, Po-224, and At-224 are added in this revision, together with new in-beam.-ray and Coulomb excitation data for Ra-224. Although, not much new experimental data have appeared since the previous evaluation (1997Ar05), extensive modifications have been made in almost all the datasets. This work supersedes the information presented in the previous NDS evaluations of A= 224: 1997Ar05, 1986Ma45 and 1976El05.