Nuclear-decay studies of neutron-rich rare-earth nuclides (open access)

Nuclear-decay studies of neutron-rich rare-earth nuclides

Neutron-rich rare-earth nuclei were produced in multinucleon transfer reactions of {sup 170}Er and {sup 176}Yb projectiles on {sup nat}W targets at the Lawrence Berkeley Laboratory SuperHILAC and their radioactive decays properties studied at the on-line mass separation facility OASIS. Two unknown isotopes, {sup 169}Dy (t {sub 1/2} {equals} 39 {plus minus} 8 s) and {sup 174}Er(t{sub 1/2} {equals} 3.3 {plus minus} 0.2 m) were discovered and their decay characteristics determined. The decay schemes for two previously identified isotopes, {sup 168}Dy (t{sub 1/2} {equals} 8.8 {plus minus} 0.3 m) and {sup 171}Ho (t{sub 1/2} {equals} 55 {plus minus} 3 s), were characterized. Evidence for a new isomer of 3.0 m {sup 168}Ho{sup g}, {sup 168}Ho{sup m} (t{sub 1/2} {equals} 132 {plus minus} 4 s) which decays by isomeric transition (IT) is presented. Beta particle endpoint energies were determined for the decay of {sup 168}Ho{sup g}, {sup 169}Dy, {sup 171}Ho, and {sup 174}Er, the resulting Q{beta}-values are: 2.93 {plus minus} 0.03, 3.2 {plus minus} 0.3, 3.2 {plus minus} 0.6, and 1.8 {plus minus} 0.2 MeV, respectively. These values were compared with values calculated using recent atomic mass formulae. Comparisons of various target/ion source geometries used in the OASIS mass separator facility for …
Date: April 26, 1990
Creator: Chasteler, R.M. (California Univ., Berkeley, CA (USA). Dept. of Chemistry Lawrence Berkeley Lab., CA (USA))
Object Type: Report
System: The UNT Digital Library
Texas Attorney General Opinion: JM-1168 (open access)

Texas Attorney General Opinion: JM-1168

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Jim Mattox, regarding a legal question submitted for clarification: Extant of coverage of article 6687-9b, V. T. C. S., which regulates the operation of tow truck (RQ-1883)
Date: April 26, 1990
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: JM-1169 (open access)

Texas Attorney General Opinion: JM-1169

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Jim Mattox, regarding a legal question submitted for clarification: Authority of the Texas Department of Health to reduce the financial eligibility criteria for the Chronically Ill and Disabled Children's Program (RQ-1914)
Date: April 26, 1990
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: LO90-19 (open access)

Texas Attorney General Opinion: LO90-19

Letter opinion issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Jim Mattox, regarding a legal question submitted for clarification.
Date: April 26, 1990
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: LO90-20 (open access)

Texas Attorney General Opinion: LO90-20

Letter opinion issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Jim Mattox, regarding a legal question submitted for clarification; Does the passage of amendments to Subchapter B, Chapter 52, and specifically Section 52.022, Water Code, made by Chapter 936, Acts of the 71st Legislature, Regular Session, 1989, which took effect September 1, 1989, and give the Texas Water Commission exclusive authority to create underground water conservation districts under that subchapter, create an inference that before the effective date of those amendments a county commissioners; court had authority to create such a district?
Date: April 26, 1990
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History