Results 31 to 40 of about 1,466,277 (352)

Phase-sensitive nuclear target spectroscopy

open access: yesPhysical Review Research, 2020
Mössbauer nuclei feature exceptionally narrow resonances at hard x-ray energies, which render them ideal probes for structure and dynamics in condensed-matter systems, and a promising platform for x-ray quantum optics and fundamental tests.
Benedikt Herkommer, Jörg Evers
doaj   +1 more source

Synthesis of Vanadium-Vanadium Carbide in-situ nanocomposites by high energy ball milling and spark plasma sintering [PDF]

open access: yesScience of Sintering, 2016
In the present work, Vanadium-Vanadium Carbide (V-V2C) in-situ nanocomposites were synthesized by mechanically milling vanadium powders with 0.5 wt.% stearic acid.
Krishnan Vinoadh Kumar   +1 more
doaj   +1 more source

Fall back accretion and energy injections in gamma-ray bursts

open access: yes, 2014
Intense flares that occur at late times relative to the prompt phase have been observed by the $Swift$ satellite in the X-ray afterglows of gamma-ray bursts (GRBs).
Coward, D. M.   +6 more
core   +2 more sources

A Coordinated X-ray and Optical Campaign on the Nearest Massive Eclipsing Binary, Delta Ori Aa: I. Overview of the X-ray Spectrum [PDF]

open access: yes, 2014
We present an overview of four phase-constrained Chandra HETGS X-ray observations of Delta Ori A. Delta Ori A is actually a triple system which includes the nearest massive eclipsing spectroscopic binary, Delta Ori Aa, the only such object which can be ...
Corcoran, M. F.   +24 more
core   +3 more sources

Solid state phase transitions characterized by esr and xas [PDF]

open access: yes, 2000
Measurements of the relaxation time, of electron systems to a disturbance, by two different spectroscopic methods are examined in detail, with the purpose to establish how the presence of fluctuations near a solid state phase transition are made evident
Acrivos, Juana Vivó
core   +3 more sources

X-RAY PHASE ANALYSIS OF DASHNOBAD POMEGRANATE REPROCESSED EXTRACT

open access: yes, 2023
Human beings have cultivated pomegranate (Punica granatum L.) for its medicinal and nutritious properties for over 4000 years. Pomegranate fruit with 2.5–three million tons of annual global production is used to manufacture a wide range of food products such as fruit juice, concentrate, anardana, jam, candies, toppings, and canned arils besides its ...
Buriev Kh., A.   +2 more
openaire   +1 more source

Chandra Phase-Resolved Spectroscopy of the Crab Pulsar

open access: yes, 2003
We present the first phase-resolved study of the X-ray spectral properties of the Crab Pulsar that covers all pulse phases. The superb angular resolution of the Chandra X-ray Observatory enables distinguishing the pulsar from the surrounding nebulosity ...
Allyn F. Tennant   +14 more
core   +1 more source

An Extended Burst Tail from SGR 1900+14 with a Thermal X-ray Spectrum [PDF]

open access: yes, 2003
The Soft Gamma Repeater, SGR 1900+14, entered a new phase of activity in April 2001 initiated by the intermediate flare recorded on April 18. Ten days following this flare, we discovered an abrupt increase in the source flux between consecutive RXTE ...
Chryssa Kouveliotou   +13 more
core   +3 more sources

EXOSAT X-ray Light Curves of SS ARI [PDF]

open access: yesJournal of Astronomy and Space Sciences, 1998
We construct the X-ray light curves of the W UMa type contact binary SS Arietis (HD12929) from the EXOSAT data in HEASARC data archive. The phase dependent X-ray light curves obtained by using the ephemeris of Kaluzny & Pojmanski (1984) have been ...
Yonggi Kim
doaj  

IR Monitoring of the Microquasar GRS 1915+105: Detection of Orbital and Superhump Signatures [PDF]

open access: yes, 2006
We present the results of seven years of K-band monitoring of the low-mass X-ray binary GRS 1915+105. Positive correlations between the infrared flux and the X-ray flux and X-ray hardness are demonstrated.
Bailyn C.   +7 more
core   +3 more sources

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