Singly Ionized Helium

ArXiv:astro-ph/9804323v1 29 Apr 1998
ArXiv:astro-ph/9804323v1 29 Apr 1998 To appear in The Astrophysical Journal Lyα/Hα Ratio of Singly Ionized Helium in Quasars1 Wei Zheng Center for Astrophysical Sciences, The Johns Hopkins University, Baltimore, MD 21218 ... Document Retrieval

First Light From NASA's Newly Launched Solar Dynamics ...
First light from NASA's newly launched solar dynamics observatory drevenkaine. Subscribe Subscribed Unsubscribe 640 640. Loading Loading showing a wavelength band that is centered around 304 Å. This extreme ultraviolet emission line is from singly ionized Helium, or He II, ... View Video

12 Iconic Images From Hubble Space Telescope
Cosmic Beauty. By Carolyn Collins Petersen. Space/Astronomy Expert Share Pin Tweet Submit The blue structure in the image comes from a shell of glowing helium gas. green is singly-ionized sulfur, ... Read Article

NASA SDO - Transit Of Venus, Ingress, 304 Angstrom - youtube.com
Primary ions seen: singly ionized helium (He II) Characteristic temperature: 50,000 K (90,000 ˚F) Category Science & Technology; License NASA SDO - Transit of Venus, Ingress, 171 Angstrom - Duration: 0:17. LittleSDOHMI 11,583 views. ... View Video

Of Neutral helium In Multi-fluid Approach - Researchgate.net
We consider three-fluid magnetohydrodynamic (MHD) approximation, where one component is electron-proton-singly ionized helium and other two components are the neutral hydrogen and neutral helium atoms. We derive the dispersion relation of ... Content Retrieval

EXPERIMENT 4 Spectroscopy - University Of Missouri
Type Color Approximate Surface Temperature Main Characteristics Examples O Blue > 25,000 K Singly ionized helium lines either in emission or ... Document Retrieval

Atomic Physics - National Superconducting Cyclotron Laboratory
Atomic physics PHY232 Remco Zegers zegers@nscl.msu.edu Room W109 – cyclotron building For example for Helium (2 protons (Z=2) in the nucleus), 2 electrons in ¾b) singly ionized helium ... Read Full Source

Problem Set 4 - HMC Physics
Problem Set 4 Due: 17 Feb 2012 1. Generalized Bohr Atom (based on C&O 5.8) A hydrogenic ion is an atom with Z protons in the nucleus, and with all but one of its electrons lost due to ionization. energies of neutral helium and singly ionized helium are ... Access Doc

A New Astrophysical Constraint On Radiatively Decaying Neutrinos
A New Astrophysical Constraint on Radiatively Decaying Neutrinos Shiv K. Sethi Inter University Centre for Astronomy and Astrophysics Post Bag 4, Ganeshkhind, Pune 411007 singly ionized helium in the IGM, we show that: for τ >∼ 1018 sec(1eV/m2 ... Fetch Doc

Continuous-wave Laser Oscillation In singly ionized Arsenic ...
Continuous-wave laser oscillation in singly ionized arsenic (charge exchange reactions) View the table of contents for this issue, The dependence of laser intensity on helium pressure, arsenic partial pressure and discharge current has been studied. ... Fetch This Document

Cross Sections For singly Differential And Total ionization ...
Cross sections for singly differential and total ionization of helium by electron impact Yong-Ki Kim National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8423 ... Doc Retrieval

Hyper-Fine Structure In Spectral Lines-Especially Those Of ...
HYPER-FINE STRUCTURE IN SPECTRAL LINES- ESPECIALLY THOSE OF SINGLY IONIZED PRASEODYMIUMk BY R. C. GIBBS, H. EI. WHITV identified as belonging to the spectra of singly ionized helium, aluminum and lanthanum, have also been found to ... View Doc

PHGN 310: Homework 5 Experimental Basis Of Quantum Mechanics (II)
Experimental Basis of Quantum Mechanics (II) Exercise 1 – Bohr model The ionization energy is the energy required to remove an electron from an 1. the n=3 level of the hydrogen atom 2. the n=2 level of He+ (singly ionized helium, He: Z=2) 3. the n=4 level of Li++ (doubly ionized lithium ... Read Full Source

Electrical Conductivity And Thermopower Of Metallic Helium
Singly ionized metallic helium. In this case, the theory will necessarily contain a larger number of free param eters, and, to determine them, experimental informa tion related to the metallic state of helium is needed. REFERENCES 1. E. G. ... Content Retrieval

Ionization - Wikipedia, The Free Encyclopedia
The interaction of atoms and molecules with sufficiently strong laser pulses leads to the ionization to singly or multiply charged ions. Then the electron a is ionized. The beginning of the ionization process is shown by the intersection with a sloped dashed line. where the MPI occurs. ... Read Article

BEAT STRUCTURE IN THE DOUBLY EXCITED RYDBERG STATES ...
BEAT STRUCTURE IN THE DOUBLY EXCITED RYDBERG STATES CONVERGING TO THE N =2 THRESHOLD OF HELIUM R. FOLLATH, G. REICHARDT, O. SCHWARZKOPF and W. GUDAT BESSY, Albert-Einstein-Straˇe 15, 12489 Berlin, Germany 3=2 level of singly ionized helium. This ... View Full Source

Pickering Series - Wikipedia, The Free Encyclopedia
The Pickering series consists of three lines of singly ionized helium found, usually in absorption, in the spectra of hot stars like Wolf-Rayet stars. ... Read Article

Physics Of Nuclear Weapons - Sonoma State University
The Helium Atom • Two electrons orbiting a nucleus with: 2 protons = Z = atomic number 2 neutrons = N • Total mass = A = Z+N • Singly ionized Helium is missing ... Fetch Document

Hydrogen-Deuterium Mass Ratio - University Of Washington
Hydrogen-Deuterium Mass Ratio 1 Background singly ionized helium (one electron orbiting around a nucleus with two protons) showed that the ratio of the wavelengths of corresponding helium and hydrogen lines (same ni and nf) was not 1:4 ... Access Full Source

Explanation Of The Helium-3 Problem
Explanation of the Helium-3 problem Theo M. Nieuwenhuizen1;2? 1 Center for Cosmology and Particle Physics, The singly ionized 3He+ contains one electron, thus the singlet spin-1 2 state brings an analogy with the neutral H-atom. Indeed, there is ... Get Content Here

PERIOD OF RESEARCH - NASA
Singly Ionized Helium," Ph. D. Thesis, Faculty of Pure Science, Columbia Uni-versity, New York, New York, 1966. 3) C. J. Artura, N. Tolk, and R. Novick, "Spectrum of the Two-Photon Emission from the Metastable State of Singly Ionized Helium," Astrophys. J. ... Access Doc

SDO / AIA - March 30, 2010 -- Solar Eruption (SUN CME ...
SDO / AIA - March 30, 2010 -- Solar Eruption (SUN CME) solarcradle. Subscribe Subscribed Unsubscribe 548 548. Loading This extreme ultraviolet emission line is from singly ionized Helium, or He II, and corresponds to a temperature of approx. 50,000 degrees Celsius. " - Credits ... View Video

Solutions Chapter 5 Problem 1 Problem 2 - New Paltz
Solutions Chapter 5 Problem 1 Series limit for the Lyman series is The equivalent of the Balmer series for the singly ionized helium atom has the following frequencies. º = cRHe ... Fetch Content

Section 42 - UCCS Home
Section 42.3 Bohr’s Model of the Hydrogen Atom . 5. For a hydrogen atom in its ground state, are the wavelengths for this same transition in (a) positronium, which consists of an electron and a positron, and (b) singly ionized helium? (Note: A positron is a positively charged electron.) 17. ... Fetch Full Source

High-Energy Cutoffin The Spectrum Of Strong-Field ...
High-Energy Cutoffin the Spectrum of Strong-Field Nonsequential Double Ionization J.S. Parker,1 B.J.S. Doherty,1 K.T. Taylor,1 K.D. Schultz,2 C.I. Blaga,2 and L.F. DiMauro2 singly and doubly ionized helium at (a) 0:8PW=cm2 and (b) 1:1PW=cm2 <I t1 1:2PW=cm2. ... Read Here