X-rays put molecules into a spin

SSRL X-rays help Illuminate Frustrated Spin Liquid State

A new magnetic state called a quantum spin liquid has been observed by a large international team of investigators from ten institutions, including a group using SSRL. When magnetic ions are located within a crystal lattice there are usually strong local magnetic and electric forces between them. At low temperatures such forces lead to a preferred alignment of the atomic moments – in ferromagne...

Spin-sensitive magnetic microscopy with circularly polarized X-rays

Methodologic Limitations Put Into Perspective

T he search for a means of measuring left ventricular volume (LVV) accurately and continuously throughout the cardiac cycle has been long standing. Such efforts have intensified during the past 15 years with the growing appreciation for the wealth of useful information available from analysis of systolic and diastolic ventricular pressure-volume relations. Recently, much effort has gone into de...

Subject headings: galaxies: general—galaxies: spiral—X-rays: general—X-rays: galaxies—X-rays: ISM

We present results from the analysis of deep ROSAT HRI and PSPC observations of the spiral galaxy M81. The inferred total (0.5–2 keV band) luminosity of M81 is ∼ 3×10 ergs s, excluding the contribution from identified interlopers found within the D25 ellipse. The nucleus of the galaxy alone accounts for about 65% of this luminosity. The rest is due to 26 other X-ray sources (contributing ∼ 10%)...

1 ( 3 ) C 8 a - - X - rays Chovnick 1 ( 3 ) E 4 a - - X - rays

Supported by a research grant, GM-09886, from the Public Health Service. References: Cohen, A.C. Jr. 1960, Biometrics 16:203-211; Gilbert, N. 1973, Biometrical Interpretation, Oxford Univ. Press, London; Hilliker, A.J. 1976, Genetics 83:765-782; S.H. Clark, A. Chovnick and W.M. Gelbart 1980, Genetics (in press); Hochman, B. 1973, Cold Spring Harbor Symp. Quant. Biol. 38:581-589; Lim, J.K. and L...