15,241 research outputs found
Coherent Excitation of the 6S1/2 to 5D3/2 Electric Quadrupole Transition in 138Ba+
The electric dipole-forbidden, quadrupole 6S1/2 5D3/2 transition in Ba+
near 2051 nm, with a natural linewidth of 13 mHz, is attractive for potential
observation of parity non-conservation, and also as a clock transition for a
barium ion optical frequency standard. This transition also offers a direct
means of populating the metastable 5D3/2 state to measure the nuclear magnetic
octupole moment in the odd barium isotopes. Light from a diode-pumped, solid
state Tm,Ho:YLF laser operating at 2051 nm is used to coherently drive this
transition between resolved Zeeman levels in a single trapped 138Ba+ ion. The
frequency of the laser is stabilized to a high finesse Fabry Perot cavity at
1025 nm after being frequency doubled. Rabi oscillations on this transition
indicate a laser-ion coherence time of 3 ms, most likely limited by ambient
magnetic field fluctuations.Comment: 5 pages, 5 figure
Soup du Jour and So Much More: A Model for School Leader Preparation
Where to go in principal preparation programs is the question that has surfaced and resurfaced for over 20 years. This question paired with the current political climate that demands strong educational accountability has created a powerful impetus to change, modify, or redesign principal preparation programs
Navigating Research Waters: The Research Mentor Program at the University of New Hampshire at Manchester
This essay uses a journal format to describe the research mentor program at the University of New Hampshire at Manchester (UNHM). Librarians, Learning Center staff, and writing instructors at UNHM have collaborated to train class-linked tutors to present basic library instruction in the classroom and to provide one-on-one research assistance to students in freshman-level composition classes. This information literacy initiative has expanded our students\u27 community of learning by providing them with point-of-need research assistance from knowledgeable peers
\u3cem\u3eDavis v. Michigan\u3c/em\u3e and the Doctrine of Retroactivity: States\u27 Refund Liability for Taxation of Federal Pension Income
\u3cem\u3eDavis v. Michigan\u3c/em\u3e and the Doctrine of Retroactivity: States\u27 Refund Liability for Taxation of Federal Pension Income
A Fundamental Misunderstanding: FCC Implementation of U.S. WTO Commitments
In bilateral and multilateral trade agreements, the United States has agreed to open the market for telecommunications services to foreign service suppliers, an obligation implemented by the FCC since 1998. In contrast, the United States has made no commitments with respect to broadcasting services or broadcast licenses. This article clarifies the different treatment of telecommunications services and broadcast services in U.S. trade obligations and FCC orders
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